Schloss Weißenstein is a Schloss or palatial residence in Pommersfelden, Bavaria, southern Germany. It was designed for Lothar Franz von Schönborn, Prince-Bishop of Bamberg and Archbishop of Mainz, to designs by Johann Dientzenhofer and Johann Lukas von Hildebrandt. Weißenstein, built as a private summer residence, remains in the Schönborn family. It is considered a masterwork of Baroque architecture.

Lothar Franz von Schönborn-Buchheim was the Archbishop-Elector of Mainz from 1694 to 1729 and the Bishop of Bamberg from 1693 to 1729. As Archbishop of Mainz, he was also Archchancellor of the Holy Roman Empire. Lothar Franz von Schönborn is known for commissioning a number of Baroque buildings, such as the palace Schloss Weissenstein.