The document provides a summary of important historical sites in Bursa, Turkey, the first capital city of the Ottoman Empire. It mentions several sultans who ruled the empire from the 13th to 15th centuries, including Osman Gazi, Orhan Gazi, Murad I, Bayezid I, and Mehmed I Çelebi. It describes tombs, mosques, and complexes built during their reigns. It also outlines other significant locations such as the House of Karagöz and Hacivat, known for Turkish shadow theatre, and natural sites including thermal springs, waterfalls, and mountains around Bursa.