The building complex, constructed in the 13th century, was the nucleus of the Rhenish Palsgraviate and secondary residence and headquarters of the district administration. The castle of Alzey was a favoured place of residence for the Palsgraves during the time of both Ruprechten, Ruprecht ll. and Ruprecht lll. who was King Ruprecht I. of Germany from 1400 - 1410. Ruprecht ll. was also given the title of “ Duke of Alzey“ and during the reign of King Ruprecht , Alzey and its castle was regarded as the office of the kingdom, due to the fact that so many documents were issued. In the 15th and 16th centuries the castle was built into a representative castle complex which was badly destroyed during the Palatine War of Succession. As a result of the romantically inspired castle restoration movement of the 19th century, the ruin was rebuilt and restored to its historical splendour at the beginning of the 20th century. Since this time it has been used as the district court house.