 Sibylle Christine of Anhalt-Dessau, the widow of Count Philipp Moritz, who had been the ruling count until 1638 had received Steinau Castle as her widow seat.As widow of a ruling count, she could raise substantial claims against the county.To avoid this, it was decided to marry Friedrich Casimir to the widow, who was 44 years old at the time, almost 20 years older than he.