Two first Ottoman sultans mausoleums are located on the hill of Tophane over-looking the Bursa city and is very close to Ulu Cami-Grand Mosque. Both mausoleums are the most visiting sights for travellers coming to Bursa. Osman Gazi & Orhan Gazi, founder of Ottoman empire and his son, two important Ottoman sultans whom they made a great effort both to establish and to enlarge the Ottoman state in 14th century. The first mausoleum is Osman Gazi shrine and it is located on the left hand side next to the martyrdom of Tophane park. Osman Gazi, the firts sultan and founder of Ottoman empire, was born in Sogut, Bilecik in 1258 as the son of Ertugrul gazi from Kayı tribe, had a big struggle against Byzantine forces to establish a state and he declared his sultanate as a free state in 1300 AD and he gave his name to the state known as Osmanlı devleti-Ottoman state. Just before he passed away during the siege of Bursa, he made a will to be buried as soon as Bursa was conquered. He was buried in a different way first but the first shrine was ruined during the earthquake of 1855 and this shrine was built in 1863 by Sultan Abdulaziz so Osman’s coffin was brought here and it was buried again. The mausoleum is made of ashlar sandstone and has a round-arched windows on all sides except the entrance door. There are seventeen sarcophagus in the tomb seven in front and ten at the back. Osman Gazi’s sarcophagi is located in the middle and is extremely beautiful sorrounded by a cage. The sarcophagi belong to Sultan Murat I’s son prince Savcı, Alaeddin Pasha, Osman Gazi’s son prince Ibrahim, Orhan Gazi’s wife Asburçe hatun and some princess’ coffins. The second mausoleum is located at the same place just opposite of Osman Gazi Tomb on the right hand side. It was built on the ruins of Byzantine church Saint Elie. The tomb was in Osman Gazi’s shrine but it was separeted and rebuilt after the earthquake in 1855 so it was renovated by Sultan Abdulaziz in 1863. The shrine has a square plan and it was covered by a dome carried by four columns. Orhan Gazi’s tomb is in the middle of the ground surrounded by brass cage. Orhan bey, son of founder Osman Gazi, and second sultan of Ottoman state, promised to his father to capture Bursa. Orhan bey conguared Bursa in 1326 AD and he built a monumental tomb for his father as he promised. Orhan gazi enlarged Ottoman empire from Bursa to Balcan Countries. The sarcopgagus in the middle belongs to Orhan gazi and the total numbers of them are 14 belonging to the different Ottoman princes & princesses buried later times. Both of the shrines are recommended those who are wondering the founders of Ottoman empire. The other tombs, except Orhan Gazi sarcophagi, belong to Cem Sultan’s son prince Abdullah, prince Korkut, Orhan Gazi’s son prince Kasım Chalabi, Kasım Chaşabi’s wife Nilfer hatun and his daughter princess Fatma, Prince Musa Chalabi the son of Bayezit I, his son Emir Chalabi and Sultan Bayezit II’s son prince Korkut. The two shrines are recommended to visit in Bursa in order to see how humble the grvaes of Ottoman sultans even they were immortal for the nation.