Goliathhaus, Gothic building in central Regensburg, Germany.

The Goliathhaus is a crenellated early Gothic former house castle built around 1220/30, spanning between Goliathstraße to the north and Watmarkt to the south. Its north facade carries a large David-and-Goliath mural, renewed several times since 1573 and repainted by Franz Rinner in 1900. The south front, the original entrance side, has one fewer storey because of the rising ground. A tower occupies the full depth on the west, and two polygonal oriel turrets with onion domes project from the north wall.

Built in the 13th century, the tower was constructed as a residential stronghold for the Thundorfer family, one of Regensburg's wealthiest merchant clans. The family occupied it for generations before its use changed in later centuries.

The building served as a statement of wealth and influence for the Thundorfer family, one of Regensburg's most prominent merchant clans. Their residence here reflected their importance in shaping the city's political and economic life.

The building spans from Goliathstraße in the north to Watmarkt in the south, so the show façade with the Goliath painting faces those arriving via Brückstraße from the Stone Bridge. The south side toward Watmarkt sits one storey lower because of the rising ground. The tower occupies the full depth on the west.

The name Goliathhaus likely goes back to a 12th-century hostel for vagrant scholars, the Goliarden, and was carried over to the new house castle around 1260. The David and Goliath painting was therefore not the source of the name; the mural itself probably dates from around 1573/74 or 1585/87, when the painter Melchior Bocksberger was working in Regensburg.