"The ruined town of Anau is situated in the desert of Kara Kum, several hours from Akhabad, in the so called 'Ahal Tekkin Oasis'. It consists of a completely deserted city and a strongly fortified citadel on a hill. (In the neighbourhood are the kurgans excavated by Pumpelly). Remains of several buildings are preserved on the fortress hill, e.g. the wall gates in the south and west with their watchtowers, small houses for the soldiers or the guards and the scarce remains of the wall of the so called palace. The building, called by the people simply 'the mosque,' is the mosque and mausoleum of Sheykh Jamal al-Din erected by his son Muhammad 860 H/1455-56."

Source: 

 The British Museum [needs further sourcing]