In the archives of Hattusa, Zippalanda was an important place of worship of the god of the storm. This was both the son of the storm god of Nerik and of the sun goddess of Arinna. A great spring festival was celebrated annually in Zippalanda. During this fest the King was there, and he occupied a palace.
Çadir Höyük is excavated since 1993 by the University of Chicago. A website summarizes the work carried out:
The continued occupation of the site from the Chalcolithic to the first centuries of our era is in favor of rapprochement between Çadir Höyük and Zippalanda: the Hittite places of worship were mostly long inhabited places.
However, researchers believe that the constructions excavated in Alisar Höyük more match with Zippalanda. Other archaeological sites also claim this old name: Kuşaklı Höyük and Mount Uşaklı near Büyük Taslık. Two structures which may correspond to the temples were cleared of this last site :