Leadenhall Street () is a street in the City of London. It is about and links Cornhill in the west to Aldgate in the east. It was formerly the start of the A11 road from London to Norwich, but that route now starts further east at Aldgate. Leadenhall Street has always been a centre of commerce. It connected the medieval market of Leaden Hall with Aldgate, the eastern gate in the Roman city wall. The East India Company had its headquarters there, as later did the Peninsular and Oriental Steam Navigation Company (P&O). By the mid 20th century, grand stone-faced offices lined the street. Today it is closely associated with the insurance industry and particularly the Lloyd's insurance market, with its dramatic building in the adjacent Lime Street. It forms part of a cluster of tall buildings including the 48-storey “Cheesegrater” and the 38-storey “Scalpel”. Other buildings planned for the street include the 57-storey “Diamond”, the 50-storey “Prussian Blue” and the 34-storey “Gotham City”. Older buildings like the medieval church of St Katherine Cree seem incongruous among these towers, but the medieval heritage is preserved in the narrow slightly curving street and dense commercial activity. History Although Leadenhall Street is within the walls of Roman Londinium, and a map published in 1897 showed it as a Roman street, this remains speculative. The basilica, the largest building in Londinium, extended beneath the western end of Leadenhall Street. Roman remains have also been found on both sides of Leadenhall Street, beneath East India House (now No 12) and the P&O Building (now St Helen’s Square). The street probably originated in the medieval period. It appears in a map of London in 1270, then named Cornhulle in the west and Alegatestrete in the east. The name derives from a lead-roofed mansion, first used as a poultry market in 1321. The street runs from this Leaden Hall towards Aldgate, the eastern gate of the city wall. The only remaining buildings from this period are the churches of St Katherine Cree and St Andrew Undershaft in the adjacent street of St Mary Axe. The name “Ledenhall Street” first appears on a map from 1658. In the Great Fire of London in 1666, the north-eastern edge of the damaged area reached Leadenhall Market, leaving Leadenhall Street itself intact. From 1729 to 1861 the largest building in the street was East India House, the headquarters of the