King Tvrtko I was a significant ruler of Bosnia during the 14th century, reigning from 1353 to 1391. He is best known for expanding the territory of the Bosnian Kingdom and establishing it as a powerful state in the region. Tvrtko was crowned as the first king of Bosnia in 1377, which marked a pivotal moment in the country's history. Under his leadership, Bosnia experienced economic growth and cultural development. Tvrtko I also sought to strengthen ties with neighboring regions, including Croatia and Serbia, and he played a crucial role in the political landscape of the Balkans during his reign.