Britannica
Sources used in this answer
How long did the Arab siege of Constantinople last under Leo III?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Leo III
Leo III, gold solidus from Constantinople, 717–741.
The Arab siege of Constantinople under the Byzantine emperor Leo III lasted exactly one year, from August 15, 717, to August 15, 718.1