In 1547 , it was administered by Queen Bona Sforza , who in 1549 built here a residence , called Wielki Dom .
In 1526 , Mazovia was incorporated into the Crown of the Kingdom of Poland , and the Czersk Castle became a royal property .
In 1547 , Mazovia was administered by Queen Bona Sforza , who in 1549 built here a residence , called Wielki Dom .
In 1526 , Mazovia was incorporated into the Crown of the Kingdom of Poland , and the Czersk Castle became a royal property .