The Palace of the Shirvanshahs, located in Baku, is a UNESCO World Heritage Site built in the 15th century by the Shirvanshah dynasty. This monument is the biggest piece of architecture under the Shirvan-Absheron branch and includes the main building, Diwan Khana, The Mausoleum, The Palace Mosque and The Palace Bath-house. The construction of the palace was initiated under the rule of Ibrahim I of Shirvan dynasty. The Palace is open to visitors from 10:00 am to 5:00 pm.