"Ban Stephen Kotromanić" refers to a historical figure from the medieval period in the region that is now Croatia. He was a prominent nobleman and served as a ban, which is a title for a governor or leader in certain Slavic countries. His rule is often associated with the Kingdom of Croatia during the 13th century, where he played a significant role in the political landscape of the time. Stephen Kotromanić is also linked to the Kotromanić dynasty, which was influential in the history of Bosnia and Herzegovina. The dynasty contributed to the development of these regions and their governance, shaping the cultural and political identity of the area during the late medieval period.