Charterhouse Square is a garden square, a pentagonal space, in Farringdon, in the London Borough of Islington, and close to the former Smithfield Meat Market. The square is the largest courtyard or yard associated with the London Charterhouse, mostly formed of Tudor and Stuart architecture restored after the London Blitz. The square adjoins other buildings including a small school. It lies between Charterhouse Street, Carthusian Street and the main Charterhouse complex of buildings south of Clerkenwell Road. The complex includes a Chapel, Tudor Great Hall, Great Chamber, the Barts and The London School of Medicine and Dentistry and a 40-resident almshouse. The square roughly covers a large 14th-century plague pit, discovered by deep excavations for Crossrail near which, within the main site, the history of the Charterhouse is exhibited in a branch of the Museum of London. The southern end of the square forms the southern boundary of the London Borough of Islington, where it meets the City of London. History In 1371 a Carthusian monastery was founded by Walter de Manny on what is now the north side of the square. It was established near a 1348 plague pit, which formed the largest mass grave in London during the Black Death, and tens of thousands of bodies were buried there. The common name for Carthusian monasteries, Charterhouse, was an Anglicisation of La Grande Chartreuse, whose order founded the monastery. The Charterhouse was dissolved as a monastery in 1537, and in 1545 was purchased by Sir Edward (later Lord) North (c. 1496–1564) and transformed into a mansion house. Following North's death, the property was bought by Thomas Howard, 4th Duke of Norfolk, who was imprisoned there in 1570 after scheming to marry Mary, Queen of Scots. Later, Thomas Sutton bought the Charterhouse, and on his death in 1611, endowed a hospital (almshouse) and school there, which opened in 1614, supporting 80 pensioners (known as 'brothers'). The boys' school coexisted with the home for pensioners until 1872 when Charterhouse School moved to Godalming in Surrey. Following this, the Merchant Taylors' School occupied the buildings until 1933. One side is partially occupied by Charterhouse Square School, a small independent primary school. In July 2011, English Heritage granted Grade II listed status to the "setted" road surface in the square, which was laid down in the 1860s. Administrative History The west of the square is within the former civil parish of St Sepulchre