 | Founded in the year 324 by emperor Constantine. |
 | The city burned in the year 532. |
 | It was first attacked by Vikings in 860 |
 | In 980 emperor Basil II founded the Varangian Guard as a single unit of
his army. |
 | Conquered for the first time by crusaders from 1204-1261. The city never
fully recovered from this. |
 | The Sultan Mehmet II, ruler of the Ottoman empire, conquered the city in
1453. |
 | The city was the capital until 1923. |