The Green Mosque and the Green Mausoleum are located in the eastern part of the city. These monuments, which are the symbols of Bursa, take their name from the green Iznik tiles that cover their interior walls. The Yesil Cami Mosque was built in 1419-1420 by Sultan Mehmet I Çelebi and the interior was decorated with a mosaic of green tiles added by his son and successor Murat II in 1424 after Mehmet I's death. The mosque is on a typical reverse T-plan which characterizes the first Ottoman mosques, and has a beautiful carved marble doorway. Accross the street and set in a garden stands the octogonal mausoleum, the Yesil Türbe which distinguishes by its exterior clad with green-blue (turquoise) tiles. A great part of the tiles were replaced by Kütahya tiles following damage in the earthquake of 1855. Mehmet I died in May 1421 in Edirne. His body was brought fourty days later to Bursa and was buried in the türbe which was built at the behest of Murat II. In addition to the glazed tile sarcophagus of Sultan Mehmet I, the türbe contains seven other tombs belonging to members of his family. The türbe has a beautiful mirhab which can be compared to the one in the Green Mosque. The old theological school or Medrese adjacent to the mosque houses the Ethnographical Museum.