Complex sentence: The castle became the seat of the Ballei Brandenburg and the order extended ther city greatly, with a new church, built between 1474-1522 and a new castle between 1545-1564.
Split into simpler sentences: The castle became the seat of the Ballei Brandenburg and the order extended the city greatly. They built a new church between 1474-1522 and a new castle between 1545-1564.