Maurice had been married before and had been a widower since 7 October 1652. When the customary mourning period had ended, he married Dorothea Maria, who was only 15 years old. Maurice's father, Elector John George I of Saxony died. Maurice inherited the Lordship of Zeitz as an apanage, making him the founder of the Saxe-Zeitz branch of the House of Wettin.
