Wall painting from the Harta tumulus. The Wikipedia has more. I quote: “In the middle of the 6th century BCE, the Achaemenid Persian Empire, led by Cyrus the Great, conquered most of the polities that existed at that time across western Anatolia, most notably the Lydian kingdom of Croesus. [….] For half a century before the Persians invaded, the Lydians of west-central Anatolia had been burying their rulers in stone chamber tombs under monumental tumulus burial markers, a form borrowed in part from the Phrygians. Although the Lydian tumuli become smaller after the Persian invasion, they also become more numerous. Thus a local burial tradition was allowed to continue, but with changes based on outside influences. […] Two of the known tombs of Lydian Tumuli had painted walls. Unfortunately, looting and destruction of the tombs, as well as the subsequent dispersal of the paintings and objects on the art market has significantly limited the scientific investigation of these tombs. The first tomb, called Harta, or Abidintepe, is located in Manisa Province and has three separate profile views of human figures. It is believed that these three persons were walking one behind the other with many additional figures in a procession around the tomb chamber, possibly bearing gifts for the deceased. This type of procession is very similar to the one carved in relief on the Apadana at Persepolis. Further Persian influence is evident from the servant costume worn by one figure that reflects costumes seen at Darius I's palace at Susa.