Complex sentence: Over the next century, there were several rulers and in 1890, the bibliophile count Zygmunt Czarnecki took over; the city remained the family estate of the Czarnecki family until 1939.
Split into simpler sentences: Over the next century, there were several rulers and in 1890, the bibliophile Count Zygmunt Czarnecki took over. The city remained the family estate of the Czarnecki family until 1939.