Alaeddin Pasha

Alaeddin Pasha (c. 1281–1331) was a son of Osman I, founder of the Ottoman beylik, and a half-brother of Orhan. Orhan, the better warrior, took the leadership, and while later Ottoman princes would fight over succession, Alaeddin submitted without dispute; the brothers stayed on good terms for life.

Orhan trusted him as an adviser trained in state affairs. In 1328 or 1329 he proposed three reforms: silver coinage in the sultan's name, an official dress with a cap of white felt, and an army divided into commanded units with a wartime infantry levy. The infantry scheme failed because the soldiers lacked training.

He lived piously and founded mosques, including the Alaeddin Bey Cami in Bursa, finished in 1335. He died in 1331 and lies in Osman I's tomb there.