During this medieval period of Baku, such monuments as the Synyg Gala Minaret (11th century), the fortress walls and towers (11th–12th centuries), the Maiden Tower, the Multani Caravanserai and Hajji Gayyib bathhouse (15th century), the Palace of the Shirvanshahs (15th–16th centuries), the Bukhara Caravanserai and Gasimbey bathhouse (16th century) were built.
In December 2000, the Old City of Baku with the Palace of the Shirvanshahs and Maiden Tower became the first location in Azerbaijan classified as a World Heritage Site by UNESCO.
Three years later, in 2003, UNESCO placed the Old City on the List of World Heritage in Danger, citing damage from a November 2000 earthquake, poor conservation, and "dubious" restoration efforts.
In 2009 The World Heritage Committee praised Azerbaijan for its efforts to preserve the walled city of Baku and removed it from the endangered list.