This vast complex, dating from the 14th century BC and destroyed around 1200 BC, is the closest archaeological site to the entrance gate and the best preserved of Hattuşa's Hittite temple ruins, but even so you'll still need plenty of imagination.
As you walk down the wide processional street, the administrative quarters of the temple are to your left. The well-worn cube of green nephrite rock here is thought to have played a significant role in the Hittite religion.
The main temple, to your right, was surrounded by storerooms thought to be three storeys high. In the early 20th century, huge clay storage jars and thousands of cuneiform tablets were found in these rooms. Look for the threshold stones at the base of some of the doorways to see the hole for the hinge-post and the arc worn by the door's movement. The temple is believed to have been a ritual altar for the deities Teshup and Hepatu; the large stone base of one of their statues remains.