Pasinler or Basean (Turkish: Pasinler from Armenian: Բասեն, Pasen; formerly Hasankale and Hesenqele, meaning "the fortress of Hasan"), is a town in Erzurum Province, Turkey on the Aras River. It is located 40 kilometres (25 mi) east of the city of Erzurum and is the site of Hasankale Castle (sometimes called Pasinler Castle). It was the birthplace of the Ottoman poet Nef'i.