This document is a high school graduation paper about the Kotromanić dynasty, the medieval Bosnian ruling dynasty. It provides an overview of their rule from the 13th to 15th centuries, and examines several important figures. It discusses sovereignty charters issued by Ban Stjepan II Kotromanić in 1323 and 1405. It also profiles important members of the dynasty including Stjepan II Kotromanić, Stjepan Tvrtko I, and Queen Katarina Kosača-Kotromanić.