Complex sentence: In September 1425 commander Jan Hvězda of Vícemilice aka Bzdinka conquered the castle after 5 weeks' besiegement, had the castle destroyed and the town was attached to Vlašim.
Split into simpler sentences: In September 1425, commander Jan Hvězda of Vícemilice aka Bzdinka conquered the castle after 5 weeks' besiegement. He had the castle destroyed and the town was attached to Vlašim.