Prinzenpalais, Cultural heritage palace in Gotha, Germany.

The Prinzenpalais is an early Neoclassical villa at Mozartstraße 1 in Gotha, built in 1776. The two-storey building has tall windows, a broad central risalit with a triangular pediment and three portal-like doors reached by an outdoor stair. Inside, a round stair hall lit from above by a lantern leads to the upper rooms.

Prinz August von Sachsen-Gotha-Altenburg, brother of Duke Ernst II, had the villa built in 1776 by government councillor Hans Wilhelm von Thümmel following Andrea Palladio's rules. August, a friend of Goethe and correspondent of Herder, discussed Enlightenment ideas here. In 1806 he left the estate to his nephew Friedrich, who resided in the palace and in 1824 added the Rathgeber monument to the garden. A 1838 fire destroyed the upper floor; the palace later served as a ducal guesthouse.

Prinz August of Saxe-Gotha-Altenburg, who had served as a general in Dutch service, discussed the ideas of the Enlightenment and the French Revolution with a circle of like-minded people in his villa. The building later served as a ducal guesthouse, and in 1848 demonstrators gathered in front of it during the March Revolution.

The Prinzenpalais is at Mozartstraße 1 in Gotha. Since its 2017–2018 conversion by the AWO AJS gGmbH it houses a day-care station for seniors, three age-appropriate flats and a hall that can again be used for public events; two flat-roofed side wings were added on 6 August 2018. Visitors reach the upper floor by a round spiral staircase in a round stairwell lit from above by a lantern.

The garden behind the palace received a monument in 1824: the Rathgeber-Denkmal "Ära der Freundschaft", decorated with figure elements, carved by the Gotha sculptor Johann Balthasar Jacob Rathgeber, a pupil of Schadow. The park later became an allotment garden and a air-raid shelter was built there.