Stjepan Vukčić Kosača was a powerful Bosnian nobleman who was politically active from 1435 to 1465; the last three decades of Bosnian medieval history. During this period, three kings acceded to the Bosnian throne: Tvrtko II, Thomas (Tomaš), Stephen Tomašević (Stjepan Tomašević) and anti-king Radivoj—the older brother of King Thomas—before the country was conquered by the Ottomans. 🇧🇦🇧🇦