The condominium lasted until the Counts of Hanau died out in 1736. The Archbishop of Mainz then took over the free court as its only surviving lord, but in 1740 had to cede the "Amt" of Somborn to the Landgraves of Hesse-Kassel, who were the heirs to the County of Hanau, after a fierce legal battle. What was thereafter left of the free court was incorporated as the "Amt" of Alzenau into the Archbishopric of Mainz. The Wheel of Mainz in the town's arms still recalls this time today.