Dating back to the 14 th century, Leadenhall was originally a meat, poultry and game market. Over the years it has survived changes in use, rebuilding (the wrought iron and glass building we see today dates from 1881) and even the Great Fire of London, to become a popular shopping and socialising destination for residents, workers and visitors. Part of Harry Potter and the Philosopher’s Stone (the first film in the blockbuster series) was filmed in Leadenhall in 2000/1. The market was used to represent the area of London leading to popular wizarding pub The Leaky Cauldron and magical shopping street Diagon Alley. Built between 1411 and 1440, the spectacular Guildhall is still the ceremonial and administrative centre of the City of London. The magnificent Great Hall, with its stained glass windows and monuments to national heroes, acts as the grand setting for glittering banquets, receptions and royal occasions. During Roman times, it was the site of an amphitheatre, the remains of which can be seen in the basement of the Guildhall Art Gallery. Beneath Guildhall is the largest medieval crypt in London, its vaulted ceiling resting on stone and marble pillars.