Mausolus was a ruler of Caria and a satrap of the Achaemenid Empire. He enjoyed the status of king or dynast by virtue of the powerful position created by his father Hecatomnus, who was the first satrap of Caria from the hereditary Hecatomnid dynasty. Alongside Caria, Mausolus also ruled Lycia and parts of Ionia and the Dodecanese islands. He is best known for his monumental tomb and one of the Seven Wonders of the Ancient World, the Mausoleum at Halicarnassus, the construction of which has traditionally been ascribed to his wife and sister Artemisia.

Kaunos was a city of ancient Caria and in Anatolia, a few kilometres west of the modern town of Dalyan, Muğla Province, Turkey.