 The sarcophagi (often purely symbolic, as the body is below the floor) may be draped in a rich pall, and surmounted by a real cloth or stone turban, which is also traditional at the top of ordinary Turkish gravestones (usually in stylised form).Two of the most famous are in the Süleymaniye Mosque in Istanbul; the Yeşil Türbe ("Green Tomb") of 1421 is an unusually large example in Bursa, and also unusual in having extensive tile work on the exterior, which is usually masonry, whereas the interiors are often decorated with brightly colored tiles.Other parts of the Islamic world reflected local techniques and traditions.