This document discusses the history of three important locations in Turkey: 1) The Ulu Camii Mosque in Bursa, built in the late 14th century on the orders of the Ottoman sultan to fulfill a promise after a victory. 2) The historic village of Cumalikizik near Uludag, which preserves Ottoman architecture and is a popular filming location. 3) The arsenals of the Ottoman Empire, including the establishment of many new arsenals after the conquest of Istanbul, such as those in Avlonya, Semendire, and Belgrad.