Complex sentence: In 1531 he moved to the Chełm area, and from then frequented the court of Hetman Mikołaj Sieniawski; he converted to Calvinism, took part in synods, and founded Protestant schools and communities on his lands.
Split into simpler sentences: In 1531 he moved to the Chełm area, and thereafter frequented the court of Hetman Mikołaj Sieniawski. He converted to Calvinism, took part in synods, and founded Protestant schools and communities on his lands.