In 1191, Béla met his son-in-law, Isaac II, in Philippopolis (now Plovdiv in Bulgaria) and Syrmium, but the results of their negotiations remained unknown.
Pada tahun 1191, Béla bertemu dengan menantunya, Isaac II, di Philippopolis (sekarang Plovdiv di Bulgaria) dan Syrmium, namun hasil perundingan mereka tetap tidak diketahui.