Psusennes I was the third pharaoh of the 21st Dynasty who ruled from Tanis between 1047 and 1001 BC. Psusennes is the Greek version of his original name Pasibkhanu or Pasebakhaenniut, which means "The Star Appearing in the City" while his throne name, Akheperre Setepenamun, translates as "Great are the Manifestations of Ra, chosen of Amun." He was the son of Pinedjem I and Henuttawy, Ramesses XI's daughter by Tentamun. He married his sister Mutnedjmet.

Tanis or San al-Hagar is the Greek name for ancient Egyptian ḏꜥn.t, an important archaeological site in the northeastern Nile Delta of Egypt, and the location of a city of the same name. It is located on the Tanitic branch of the Nile, which has long since silted up.