Simplify the following text for a Grade 5 native English-speaking person.
Original: Hattusili III ( Hittite : `` from Hattusa '' ) was a king of the Hittite empire ( New Kingdom or Late Empire ) ca . 1267 â `` 1237 BC ( short chronology ) .
Simplified: Hattusili III was a king of the Hittite empire around 1267 â `` 1237 BC .