A walk along and around a stretch of London's most famous hidden river. The River Fleet is underground these days, but it's left its mark on the landscape. Discover the layers of history in this less explored corner of central London.

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Working, sleeping, playing – the City of London is home to all sorts of activities after dark. This walking tour will explore buildings and spaces, well known and lesser-known, in darkness, and will tell the history of night-time in London. We will visit places where London works, sleeps and plays at night, and over the course of two hours will even see how night time activity shifts.

Hidden behind two Listed Building facades opposite Smithfield Market, and spread across eight floors below and above ground, E.ON's Citigen energy centre produces electricity, heat and cooling to buildings across the Square Mile.

St John's Gate and the Priory Church are the remaining buildings from the medieval priory of the Knights Hospitaller and are both Grade I listed. St John’s Gate dates from 1504 and features stunning Victorian and Edwardian interiors. The Priory Church was reconstructed by Seely & Paget after the Second World War, but its 11th-century crypt survives.

Richard Norman Shaw, 1874

A unique modern courtyard house making brilliant use of an off-street site on Clerkenwell Green. A retractable glass roof gives wonderful natural light all year round and opens the house to the sky in dry weather.

Paxton Locher Architects, 1995

Grade II listed, built as a Welsh Charity School in 1738. A library with a focus on Marxism and Socialism since 1933. Lenin worked here 1902-03 and his office is preserved. Fresco by Jack Hastings in 1st floor. Late 15C tunnels.

Sir James Steere, 1738

Join us for Bartholomew Fayre: Power to the People, a FREE bold and brilliant grassroots community festival, celebrating creativity, history, activism and togetherness. Across two-jam packed days, we’ll be taking over Smithfield with an exciting mix of hands-on art, thought-provoking talks, walking tours and live performances inspired by the anarchic joyousness of the original Bartholomew Fair.

Tranquil Clerkenwell, so close to the bustling City, has a distinct character and intriguing history. Once centred around great religious houses, the area has been the scene of fierce rebellion, innovative architecture, and major commerce.

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Bartholomew's Fayre is a community festival taking place within the Smithfield Rotunda Garden, Great St Barts and the surrounding areas.

Founders' Hall boasts a unique blend of neo-Vernacular, Arts and Crafts, and Post-Modern styles. Its exterior features distinctive gabled bays, terracotta panels, and metal grilles, while the interior showcases a ceremonial staircase, ornate parlour, and a livery hall illuminated by impressive œil de bœuf windows, creating an exceptional fusion of architectural elements.

Green Lloyd Architects, 1987

Barts Pathology Museum, based at St Bartholomew's Hospital, houses around 5,000 medical specimens on display over 3 mezzanine levels. This Grade II Listed building is in use by students of the Faculty of Medicine and Dentistry at QMUL and as such is very infrequently open to the public. Specimens include the skull of John Bellingham, examples of unusual diseases, and early surgical intervention.

Edward l'Anson, 1879