Osman I Timeline

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c. 1258 CE - c. 1323 CE

Life of Osman I.
c. 1280 CE

Osman I succeeds his father Ertuğrul as ruler of his territory.
1299 CE

Osman I’s forces lay siege to Nicaea.
1299 CE - 1326 CE

Reign of Osman I.
1300 CE

Osman I’s forces capture the city of Yenşiehir and make it the first capital of Osman’s Beylik.
1301 CE

The Byzantine Empire breaks the siege of Nicaea.
1302 CE

Osman I’s forces defeat the Byzantines at the Battle of Bapheus.
1308 CE

The Bithynian capital of Prusa is put under siege by Osman I and his army.
c. 1323 CE

Osman I dies and his son Orhan succeeds him.
1326 CE

Orhan successfully captures the city of Prusa, which he renames Bursa.