Londinium in 400 AD showing the Roman wall
The London Wall was the defensive wall built by the Romans around Londinium. Londinium was then, as now, the most important port town on the River Thames.
London Wall is now the name of a road in the City of London. It runs along part of the course of the old wall. Until the later Middle Ages, the wall defined the boundaries of the City of London.
Images for kids
A surviving fragment of the original 3rd-century Roman Wall in Cooper's Row near Tower Hill tube station.
Bastion, which is near the Barbican Estate, stands on Roman foundations with an upper structure of 13th-century masonry.
Pink area shows the extent of the 1666 Great Fire of London. Most of the city within the walls was destroyed.
The modern (post-1976) road named London Wall
Bastion 14 in London Wall, which is overlooked by the Museum of London.