• It’s Museums at Night weekend which means its your chance to see some of London’s best museums after hours. Culture24′s annual event, which runs from 18th to 20th May, features more than 5o late openings and special events in London – from after dark visits to Aspley House, the former home of the Duke of Wellington, to the chance to hear about the history of ‘Bedlam’, one of the world’s oldest psychiatric facilities, at the Bethlem Archives & Museum and Bethlem Gallery, and a “Cinderella shoe” workshop at the Design Museum. As well as organisations like the British Museum and National Gallery, among the lesser known museums taking part are the Cuming Museum in Southwark, the British Dental Association Museum, and the Ragged School Museum in Mile End. For all the details, follow this link

Saturday sees the opening of a new V&A exhibition featuring more than 60 ballgowns dating from 1950 to the present day – the first exhibition to be held in the newly renovated Fashion Galleries. Among those gowns on display as part of Ballgowns: British Glamour Since 1950 will be royal ballgowns including a Norman Hartnell gown designed for Elizabeth, the Queen Mother, Catherine Walker’s ‘Elvis Dress’ worn by Princess Diana (pictured), and gowns worn by today’s young royals. There will also be gowns worn by celebrities including Sandra Bullock, Liz Hurley and Bianca Jagger and works by the likes of Alexander McQueen, Jenny Packham and a metallic leather dress designed by Gareth Hugh specifically for the exhibition. Runs from 19th May to 6th January. Admission charge applies. See www.vam.ac.uk for more. PICTURE: Victoria and Albert Museum, London

The man credited with popularising the modern-day limerick, Edward Lear, has been honored with a green plaque at his former house in Westminster. The Westminster Council plaque was unveiled on Saturday – what would have been his 200th birthday – at 15 Stratford Place where he lived from 1853 until 1869. Lear, who was born in Holloway and raised in Grays Inn Road, was famous for his work The Owl and the Pussycat, and as well as for his writings, was also noted as an artist and illustrator. Councillor Robert Davis reportedly had a go himself at a limerick in honour of the artisy: “There once was man named Lear, who lived in a spot close to here. This plaque unveiled today, is a fitting way, to pay tribute on his two hundreth year”.

• On Now: The Queen: Art and Image. Having been on tour across Britian, this exhibition features some of the most remarkable images ever created of the Queen opened at the National Portrait Gallery this week. Containing works by Cecil Beaton and Annie Leibovitz, Pietro Annigoni and Andy Warhol, the exhibition is the most wide-ranging exhibition of images in different media ever devoted to a single royal sitter. Highlights include full-length 1954-55 painting by Annigoni (pictured, right, it’s displayed with his 1969 portrait), Lucian Freud’s 2000-01 portrait and Thomas Struth’s recent large-scale photograph of both the Queen and the Duke of Edinburgh as well as a never previously loaned 1967 portrait by Gerhard Richter and a specially commissioned holographic portrait. Runs until 21st October. Admission charge applies. For more, see www.npg.org.uk. PICTURE: Queen Elizabeth II, Queen Regent by Pietro Annigoni, 1954-5. The Fishmongers’ Company

• Epping Forest’s historic Butler’s Retreat has reopened its doors as a cafe following a refurbishment project to restore the building to its former glory. The building was constructed in the 19th century and is one of the last remaining Victorian-era ‘retreats’ within the forest. Named for its 1891 occupier, John Butler, it was one of a number of retreats built to serve refreshments as part of the Temperance movement – said to have been “extremely popular” with visitors from the East End. The building, which now forms part of the Epping Forest visitor hub, is expected to host a range of events this summer and will have its opening hours extended with the slated opening of a restaurant upstairs in the evenings. Owned by the City of London, Epping Forest is the largest public open space in the London area, stretching across 12 miles from Manor Park in East London to a spot past Epping in Essex. The cafe, the refurbishment of which was carried out with funding provided via the Heritage Lottery’s Branching Out project, will be open from 9am to 5pm weekdays and 8am to 5pm weekends. For more on the cafe, see www.worldslarder.co.uk. For more on Epping Forest, see www.cityoflondon.gov.uk/eppingforest

• On Now - Designs of the Year Exhibition: The London Olympic Torch and the Duchess of Cambridge’s wedding dress are among 90 objects nominated as one of the “best designs in the world” in this year’s Design of the Year competition. The objects, which go on display at the Design Museum today, have been entered in seven categories – architecture, digital, fashion, furniture, graphics, product and transport – with winners to be announced on 24th April. Among the other objects nominated are a wind-propelled landmine detector, a pop-up cinema in Hackney, the London 2012 velodrome and the first Tesco virtual store. An admission charge applies for the exhibition which runs until 15th July.  For more information, see designsoftheyear.com.

On Now - Lucian Freud Portraits. The last work of the late artist Lucian Freud is on show for the first time in this exhibition at the National Portrait Gallery. The unfinished painting, Portrait of the Hound 2011, which depicts Freud’s assistant assistant David Dawson and his dog Eli, is a highlight of the exhibition which also includes works dating back as far as the 1940s. The 130 paintings and works on paper – which feature sitters including artists Francis Bacon and David Hockney along with the likes of Andrew Parker Bowles and Baron Rothschild – have been loaned from museums and private collections around the world. Runs until 27th May, 2012. Admission charge applies. See www.npg.org.uk.

A new pleasure garden will be built in the city’s east as part of celebrations for next year’s Diamond Jubilee. London Pleasure Gardens, announced back in March, will be built upon a 60,000 square metre site at Pontoon Dock, opposite the ExCeL Exhibition Centre, and consist of an “ever-evolving creative playground for both resident Londoners and tourists alike”. The gardens, which will feature landscaped walkways, a floating cinema, an ‘adult’s playground’ and a range of facilities such as a ‘glass cafe’ - are expected to be open for the Queen’s Jubilee Weekend on 1st June. It’s expected that more than 40,000 people a day will pass through the site during the Olympics. London has had a long association with the concept of pleasure gardens – places where people gathered to listen to music, see art, eat and drink and talk, the most famous of which was the Vauxhall Pleasure Gardens. But the Royal Docks also had its own pleasure gardens in the past – these existed between 1851 and 1884 and were named the Royal Victoria Gardens.  For more, see www.londonpleasuregardens.com.

• Music hall star Dame Gracie Fields has been honored by English Heritage with a blue plaque on the Islington house where she lived for three years in the 1920s. It was while living at 72a Upper Street with her parents and first husband Archie Pitt, that she consolidated her reputation as one of Britain’s most popular performers and it was also during this time that she recorded for the first time (she was to become a regular on the BBC and by 1933 had cut a massive four million discs) and appeared before King George V and Queen Mary at a Royal Variety Performance. Following her success, Fields and Pitt built a mansion in The Bishop’s Avenue, Hampstead, called ‘The Tower’ in honor of the show which had made her a star – Mr Tower of London. She later separated from Pitt and married an Italian born director Monty Banks. They moved to the US in 1940 amid fears her husband would be interned and, after the war, she settled on the Italian island of Capri where, following Banks’ death in 1950, she married again. She made her final appearance on the London stage in 1978 – closing a Royal Variety Performance – and died back in Capri the following year.

• And, briefly…..A new species of dinosaur – Spinops sternbergorum - has reportedly been discovered at the Natural History Museum, identified from bones previously gathering dust on a shelf at the museum.

On Now: Imagined Lives: Portraits of Unknown People. This exhibition at the National Portrait Gallery centres on a group of 14 portraits from the 16th and 17th centuries which depict unknown people. Originally thought to represent famous figures like Queen Elizabeth I, the identity of the sitters is now considered unknown. In response to the pictures, eight internationally renowned authors – from Alexander McCall Smith and Joanna Trollope to Julian Fellowes and Terry Pratchett – have written imaginative short stories about the portraits, bringing them to life. The exhibition was originally shown in Somerset but is now running at the NPG until 22nd July. Admission is free. For more information, see www.npg.org.uk.

On Now: London and the Olympics. The Museum of London is hosting a new display which looks at the 1908 and 1948 Olympic Games held in London but, in twist, looks at not only the experiences of Londoners but those of the 41 man team Peru sent to the 1948 games. Pictures included in the display come from an album made by one of the athletes, Enrique Mendizabal Raig, recording the team’s visit (you can find the images on Flickr here). Entry is free. Runs until September. For more, see www.museumoflondon.org.uk.

The most acclaimed tragic actress of the 18th and early 19th centuries, Sarah Siddons is best remembered for her iconic role as Shakespeare’s Lady Macbeth.

Born in 1755 into the theatrical Kemble family (her father was an actor and theatre manager and many of her 11 younger siblings, including John Philip Kemble, also went on to be actors) in Brecon, Wales, Siddons first began appearing with Kemble’s company while still at school. Still only a young teenager, she also began a romance with one of the company’s actors, William Siddons.

The liaison was discouraged by her parents (as was the idea of her acting) and in 1770 she was sent into service with a family in Warwick. She had kept up correspondence with Siddons, however, and, after her parents withdrew their opposition to the match, they were married on 26th November, 1773.

The couple rejoined Kemble’s company initially but were soon working for another, Chamberlain and Crump, and it was while doing so in the spa town of Cheltenham that Siddons’ abilities came to the notice of famed actor, playwright and theatre manager David Garrick.

Invited to London, her initial foray into acting there, however, fell flat and, following a short-lived season at Drury Lane Theatre which resulted in her services no longer being required (it is believed the fact she had two very young children at the time, having only just given birth to the second, didn’t help her performances), Siddons instead headed to the country and worked in places like York, Manchester and Bath, rebuilding her somewhat battered reputation.

It proved a successful move for when she was invited back to London in 1782, her now not just restored but blossoming reputation preceded her. To much acclaim she performed in the title role in David Garrick’s play, Isabella, or, the Fatal Marriage.

It was to be the first of many high profile roles – the most famous of which was to play Lady Macbeth – and Siddons soon rose to become the most sought-after actress in the city, a position which allowed her to mix among the elite of society (among her friends were counted lexicographer Dr Samuel Johnson and philosopher Edmund Burke and she even appeared before King George III and Queen Charlotte). Venerated as a “cultural icon”, her star continued to climb in the 1780s and it was in 1783-84 that she sat for a portrait, The Tragic Muse, by Sir Joshua Reynolds (pictured).

Her personal life, meantime, was another matter and in 1804, Siddons and her husband – who had increasingly spent time apart during the preceding years, formally separated (William died in Bath four years later). She had also experienced the deaths of many of her children – in fact, only two of her seven children were to outlive her.

Siddons retired from the stage in 1812 – her final moving performance was, you guessed it, as Lady Macbeth – but continued to appear on special occasions until 1819.

She died in June, 1831, and, following a huge funeral, was buried at St Mary’s Cemetery at Paddington Green. There is a statue of her at the grave. Siddons is among those actresses currently featured in the National Portrait Gallery exhibition The First Actresses – Nell Gwyn to Sarah Siddons. The exhibition runs until 8th January (an admission charge applies). For more information visit www.npg.org.uk.

For further reading – Robyn Asleson’s A Passion for Performance: Sarah Siddons and Her Portraitists

PICTURE: Sarah Siddons as the Tragic Muse by the Studio of Sir Joshua Reynolds, 1784  © National Portrait Gallery, London

Perhaps now best known as the most prominent of the many mistresses of King Charles II, Eleanor ‘Nell’ Gwyn – currently subject of a new exhibition at the National Portrait Gallery – was a renowned actress in the years after the Restoration, known for her wit and beauty – “Pretty, witty Nell “as diarist Samuel Pepys called her.

Gwyn’s (variously spelt as Gwynn or Gwynne) origins remain something of a mystery – believed to have been born around 1651, her parents remain something of a mystery (some have suggested a Cavalier, Captain Thomas Gwyn, as her father) as does the place of her birth, variously claimed to be London, Hereford or Oxford – one source from 1715 claims she was born in Coal Yard Alley, off Drury Lane in Covent Garden.

Ascribed as having various jobs during her childhood – everything from helping at a bawdyhouse to a street vendor or cinder girl – around 1663, she was working as an “orange girl” at a theatre then known as the King’s Theatre in Bridge Street (now the site of the Theatre Royal Drury Lane).

She clearly made an impression for a year later she was working as an actress and is believed to have taken prominent actor Charles Hart as her lover. It has been suggested her first recorded stage appearance was in March, 1665. She wasn’t viewed as a brilliant dramatic actress but instead came into her own in comedies where her wit, as well as her beauty, could shine.

Having already been known to have had at least two lovers – Charles Hart and aristocrat Charles Sackville, Lord Buckhurst – by 1667 George Villiers, Duke of Buckingham, had decided to bring her to the attention of the king as a possible new mistress and so increase his influence. By 1668 or 1669, Nell is believed to have succeeded in this, joining the growing number of women who could claim the title (Charles II ended up having at least 12 children by his many mistresses).

Her acting work gradually decreased and in 1670, she gave birth to Charles, her first son and believed to be the king’s seventh illegitimate child. She briefly returned to the stage in 1670-71 before retiring from the theatre for good.

In February, 1671, Nell moved into a townhouse at 79 Pall Mall (she was granted freehold of the property five years later and the property, which still stands, remains the only one on the south side of Pall Mall not owned by the Crown) and in December, she gave birth to her second child by the king, another son James (he died in Paris while attending school there 10 years later).

Both sons were given titles – Charles was later named Duke of St Albans – and given the surname Beauclerk. In the 1670s, Charles granted Nell Burford House in Windsor where she resided when the king was resident there.

In the 1670s, Nell – who continued to maintain her friendships with the likes of Villiers – successfully fought off several rivals for the king’s affection and by the 1680s, her position as the king’s mistress was not in doubt. It was during this period that the story goes when her coach was mistaken by an angry to be that of the unpopular Duchess of Portsmouth, she put her head out the window to tell them “Pray good people be silent, I am the Protestant whore”.

When King Charles II died on 6th February, 1685, he left instructions she was to be looked after – his brother King James II both paid her debts and continued to pay her an annual pension.

Nell died less than three years later – still only aged in her thirties – on 14th November, 1687, have suffered strokes in previous years. She was buried in the church of St Martins-in-the-Fields.

Gwyn is seen as a key figure in London during the period after the Restoration and a symbol of the hedonism of the court of King Charles II, and her rise from apparently humble origins to the royal court has been the subject of numerous books, plays and films.

Gwyn is currently featured in an exhibition currently being held at the National Portrait Gallery: The First Actresses – Nell Gwyn to Sarah Siddons. The exhibition runs until 8th January (an admission charge applies). For more information visit www.npg.org.uk.

PICTURE: Eleanor ‘Nell’ Gwyn, by Simon Verelst, © National Portrait Gallery, London

• A new exhibition featuring some of London’s leading ladies of the eighteenth century opens at the National Portrait Gallery today. The First Actresses: Nell Gwyn to Sarah Siddons is the first exhibition devoted to eighteenth century actresses and features 53 portraits depicting the likes of Gwyn and Siddons as well as Lavinia Fenton, Mary Robinson and Dorothy Jordan. Highlights of the exhibition include a little known version of Joshua Reynolds’ portrait of Sarah Siddons as the “tragic muse”, William Hogarth’s The Beggar’s Opera and Thomas Gainsborough’s portraits of Giovanna Bacelli and Elizabeth Linley. The exhibition reveals the key role these women played in the celebrity culture found in London (and elsewhere) during the period. As a counterpoint, an accompanying exhibition displays photographs and paintings of some of today’s actresses. Runs until 8th January (an admission charge applies). For more information on the exhibition or the programme of accompanying events, see www.npg.org.uk.

Cemetery in Hackney and Kensal Green, a park in Hounslow and a Piccadilly property formerly used as the Naval and Military Club are among the “priority sites” listed on English Heritage’s annual Heritage At Risk Register. Released earlier this week, the register’s 10 London”risk priority sites” include London’s first metropolitan cemetery – Kensal Green (All Souls) – which dates from 1833, Gunnersbury Park in West London – featuring a large country home known as Gunnersbury Park House, it was built in 1801-28 and later remodelled, and a mansion at 94 Piccadilly – built in 1756-60 for Lord Egremont, it was later used at the Military and Naval Club and is now for sale. Others on the list include Abney Park Cemetery in Hackney – laid out in 1840, it is described as London’s most important Nonconformist cemetery, a medieval manor farm barn in Harmondsworth in London’s outer west, Tide Mill in Newham, East London, and the entire Whitechapel High Street and Stepney Green conservation areas. For more information, see www.english-heritage.org.uk/caring/heritage-at-risk/.

On Now: The Heart of the Great Alone: Scott, Shackleton and Antarctic Photography. Opening at the Queen’s Gallery, Buckingham Palace, tomorrow, the exhibition marks the centenary of Captain Robert Scott’s ill-fated expedition to the South Pole and features a collection of photographs presented to King George V by the official photographers on Scott’s expedition of 1910-13 and Ernest Shackleton’s expedition of 1914-16 as well as unique artifacts including the flag given to Scott by Queen Alexandra (the widow of King Edward VII) which was taken to the Pole. Highlights include Herbert Ponting’s images The ramparts of Mount Erebus and The freezing of the sea and Frank Hurley’s stunning images of Shackleton’s ship Endurance as it was crushed by ice. Runs until 15th April, 2012 (admission charge applied). For more, see www.royalcollection.org.uk.

A stunning portrait on a grand scale, The Ambassadors depicts two influential figures from the 16th century - Jean de Dinteville, the then 29-year-old French ambassador to England and Georges de Selve, the then 25-year-old bishop of Lavaur and sometime French ambassador to the Emperor, the Venetian Republic and the Holy See.

The oil on oak work, which is housed in room four of the National Gallery and is also one of the images featured online as part of the Google Art Project, was painted by Hans Holbein the Younger in 1533 and is meant as a portrait to show the men’s power, learning and wealth – they are surrounded by objects which include celestial and terrestrial globes, a portable sundial, a lute (and its case), and books including one of hymns and another of arithmetic as well as richly decorated furnishings.

Yet there’s more to this painting than initially meets the eye – a closer look reveals a distorted skull in the foreground which, when viewed from the painting’s right-hand side comes into its proper perspective. A reflection on mortality perhaps?

And though no typically viewed as a religious work, there are also some striking religious overtones to this image including a broken string on the lyre – often seen as a Christian symbol of disharmony – and, partly hidden behind the curtain on the far left of the painting as you look at it, a crucifix hanging on the wall.

Holbein painted the work during his second stint in England while depicting life at the Tudor court. Among his most famous other images are one of King Henry VIII (held in the National Portrait Gallery) and another of Christina of Denmark (also in the National Gallery – painted to show Henry VIII the image of a potential future wife although the relationship never went any further than that).

PICTURE: Ng1314, Hans Holbein the Younger, Detail of Jean de Dinteville and George de Selve (‘The Ambassadors’), 1533 © The National Gallery, London.

WHERE: Room 4, National Gallery, Trafalgar Square (nearest tube stations Leicester Square and Charing Cross); WHEN: 10am to 6pm (Fridays 10am to 9pm); COST: Free; WEBSITE: www.nationalgallery.org.uk. The image is also available online as part of the Google Art Project here:www.googleartproject.com/museums/nationalgallery/the-ambassadors.