Fregehaus, Baroque merchant house in Leipzig, Germany

Fregehaus is a Baroque merchant house at Katharinenstraße 11 in Leipzig's city centre, built in 1706–1707 by master mason Johann Gregor Fuchs for merchant Gottfried Otto, who had the earlier Renaissance house on the site remodelled. The four-storey building has four wings around a rectangular courtyard; its symmetrical main façade carries a box bay window decorated with fruit garlands, and the steep 62-degree saddle roof holds 16 dormers in four rows. Surviving from the predecessor are the cross vault of the courtyard entrance, ground-floor portals and a courtyard relief mocking Luther.

The site's older Renaissance house, probably built around 1535, was bought in 1705 by merchant Gottfried Otto, who had it rebuilt in Baroque style in 1706–1707 by Leipzig master mason Johann Gregor Fuchs. Banker Christian Gottlob Frege II acquired it in 1782, giving it its name; the Frege family's private bank stayed until 1945. From 1978 the VEB Leipziger Denkmalpflege occupied it and restored it in 1980–1986.

The name comes from banker Christian Gottlob Frege II, who bought the house in 1782; his clients included Goethe. In the courtyard stands a 1535 sandstone relief mocking the pope and emperor above a monk taken to be Luther. Today the courtyard holds the flower shop Saltoflorale, and the building has housed a hotel since 2014.

The Fregehaus stands at Katharinenstraße 11 in Leipzig's city centre, a short walk from the Markt. The inner courtyard is freely accessible, so visitors can step in to see the sandstone relief without entering the hotel or shop. The building has four storeys and no lift is mentioned in the sources.

In the courtyard, a 71-centimetre sandstone pedestal carries a 1535 high relief mocking the pope and Emperor Charles V or Duke George of Saxony, with a monk below read as Martin Luther. The base may once have supported a window column. The courtyard also holds the flower shop Saltoflorale.