Succeeding to the throne at the age of seven on the death of his father, Přemysl Otakar II, in 1278, Wenceslas lived at the court of his cousin Otto IV of Brandenburg who served as regent for Wenceslas until 1283. When Wenceslas then returned to Prague, he found that his country was dominated by the ambitious Zaviš of Falkenstein, his mother's lover and later her husband. Wenceslas arrested Zaviš in 1289, destroyed the dissident faction, and executed his rival in 1290. Thereafter he governed his kingdom successfully, exploiting its natural resources and increasing its wealth. After annexing most of Upper Silesia, Wenceslas occupied Kraków in 1291 and finally became king of Poland in 1300. Offered the Hungarian crown, he declined and placed his son Wenceslas (later King Wenceslas III) on the throne in 1301 but was forced to withdraw him in 1304.