Arinna was the major cult center of the Hittite sun-goddess known as UTU Arinna or "Sun-Goddess of Arinna", who is also sometimes identified as Arinniti or as Wuru(n)šemu. Arinna was located near Hattusa, the Hittite capital.
The Sun-Goddess of Arinna is the most important one of three important solar deities of the Hittite pantheon, besides UTU nepisas 'the sun of the sky' and UTU taknas 'the sun of the earth'.
Alacahöyük or Alaca Höyük (sometimes also spelled as Alacahüyük, Euyuk, or Evuk) is the site of a Neolithic and Hittite settlement and is an important archaeological site. It is situated near the village of Alacahüyük in the Alaca District of Çorum Province, Turkey, northeast of Boğazkale (formerly and more familiarly Boğazköy), where the ancient capital city Hattusa of the Hittite Empire was situated. Its Hittite name is unknown: connections with Arinna, Tawiniya, and Zippalanda have all been suggested.