Bassenheimer Hof, Baroque palace in Mainz, Germany

Bassenheimer Hof is a Baroque palace in central Mainz with French architecture, a symmetrical facade, and classical decorative elements across three stories. The building preserves its elegant exterior appearance and proportional structures from its founding era.

The building was constructed around 1750 at the initiative of Anselm Franz von Ritter zu Groenesteyn as a residence for the Countess of Bassenheim, sister of the prince-elector. It was later converted into military barracks, which fundamentally altered its original interior layout.

The palace's name comes from Maria Antonetta Countess Waldbott von Bassenheim, née Countess von Ostein (1710–1788), sister of the prince-elector, for whom it was built as a widow's residence. She had married Rudolf Johann Count Waldbott von Bassenheim in 1726 and raised five children after his sudden death in 1731. The building is now used by the Ministry of the Interior of Rhineland-Palatinate.

The building now serves as the headquarters of the Ministry of Interior and Sports of Rhineland-Palatinate and functions as an administrative office. Visitors should keep in mind that it is an official government building and interior access may be restricted.

The palace has no cour d'honneur, the ceremonial entrance courtyard typical of Parisian hôtels particuliers that its architect Anselm Franz von Ritter zu Grünstein had studied. Its neighbour at Acker 10 is a 1794 winemaker's house, now the restaurant Am Bassenheimer Hof, which is better known locally than the palace itself.