The city of Bursa, southeast of the Sea of Marmara, lies on the lower slopes of Uludag. Many important Ottoman buildings remain here. Bursa is very rich in thermal springs, most of which are in the Cekirge area. Visit Yesil Turbe, which consists of a mosque, a medrese, a turbe and an imaret The medrese today is a museum of Turkish and Islamic arts. Across the street, the Yesil Mosque, it's style was mostly seen during the first years of the Ottoman Empire. Ulucami was the Great Mosque of Bursa the first congregational mosque built by the Ottomans. Like many other buildings in Bursa, Ulucami also underwent many restorations due to earthquakes and fires. The features which give the mosque the quality of a calligraphy museum are the beautiful hand writings dating from the 19C. Liberation.