Alacahöyük or Alaca Höyük (sometimes also spelled as Alacahüyük, Aladja-Hoyuk, Euyuk, or Evuk) is the site of a Neolithic and Hittite settlement and is an important archaeological site. It is situated in Alaca, Çorum Province, 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.