The first wall was built by the Romans around 200AD. It was about 2 miles long and incorporated a fort. In the 4th cent it was strengthened with towers. The Roman wall formed the foundation of the City wall. It was restored as a defensive wall during the medieval and Tudor periods. From the 17th cent, as London rapidly expanded, a defensive wall was no longer needed. Much of it was demolished in the 18th and 19th cent. However during the 20th cent excavations have revealed several sections.
This section is at Cooper's Row in the courtyard of the Grange Hotel. The wall is 10.6m high in this section. During the medieval times it was heightened by 6.2m as well as the ditch at the side of the wall being widened.
This is the Archer's loophole which provided protection for the archer as he aimed his arrows through the hole.