Clay tablets
The Hittites had their own hieroglyphic writing system which they used on seals and rock reliefs but otherwise mainly on perishable materials. They also adopted the cuneiform script of Mesopotamia for writing on clay tablets and these have survived. Many have been found in the royal archives on the citadel of the Hittite capital of Hattusa (now Bogazkoy). They include administrative records, historical and mythological texts, and word-lists in other languages.