The tumuli of the Lydian royal cemetry at Bin Tepe ("thousand hills") can be found a bit north of Sardes. It was not uncommon in ancient Anatolia to bury a king in an artificial hill (e.g., there are similar tumuli at Troy and Gordium), and Lydia was no exception. Several hills have been investigated, such as the one that may have been the last resting place of king Gyges (ruled c.680-644), who had founded of the Mermnad dynasty. The burial chamber was found empty.
The tumulus of Alyattes (ruled c.600-c.560) has a diameter of 355 meter and is no less than 69 meter high. It was erected by his son Croesus and could be identified because it is described by the Greek researcher Herodotus of Halicarnassus and the geographer Strabo of Amasia. The hills must have belonged to the most impressive monuments of the Aegean world. In Antiquity, these mounds were probably crowned by giant phalloi.