Note 308 — Chapter XII · THE SIEGE
Reading edition
In 1203 the Crusaders and Venetians had forced the boom tower on the Galata side and loosed the chain; but it was then outside the city walls. In the time of Cantacuzenus, Galata had been enlarged so that the end of the chain was quite safe unless Galata were taken. The walls terminated, as may still be seen by the remaining towers, near Tophana.