[2] The historian, Laonikos Chalkokondyles, notes that the Ottomans took advantage of the Byzantine civil war of 1321–1328 to capture the city: "Andronikos decided that he should hold the throne himself, as his grandfather had already grown old, and so they fell out with each other.

"[3] According to some sources Osman I died of natural causes just before the fall of the city,[2] while others suggest that he lived long enough to hear about the victory on his death-bed[1][4][5] and was buried in Bursa afterwards.

[6] During his reign Orhan encouraged urban growth through the construction of buildings such as imarets, Turkish baths, mosques, inns and caravanserais,[7] and he also built a mosque and a medrese in what is now known as the Hisar district,[8] and after his death was buried there in his türbe (mausoleum) next to his father.

[6] The Moroccan Muslim traveler Ibn Battuta who visited Bursa in 1331 was impressed by the sultan and found Bursa an enjoyable city[6] "with fine bazaars and wide streets, surrounded on all sides by gardens and running springs.

"[9] Paul K. Davis writes, "The capture of Bursa established Osman I (Othman) and his successors as the major power in Asia Minor, beginning the Ottoman Empire.