Unterschloss Gemmingen, Renaissance manor house in Gemmingen, Germany

Unterschloss Gemmingen is a two-story, unadorned plastered building on a nearly square footprint, the youngest of Gemmingen's three medieval castles. Its 1592 Renaissance renewal under Wolf Dietrich von Gemmingen produced the ornate portal, the decorative oriel and the spiral staircase in the Hexenturm. The Hungerturm, a 13th-century tower, stands slightly apart from the main building; the former moats have been filled and turned into parkland.

The youngest of Gemmingen's three medieval castles, the Unterschloss was built around 1274 by Schweiker von Gemmingen, called Velscher, as a moated castle. In 1592 Wolf Dietrich von Gemmingen had it rebuilt in Renaissance style, adding the ornate portal, the decorative oriel and the spiral staircase in the Hexenturm. The Velscher line died out in 1552 with Hans von Gemmingen, who had passed the castle to Wolf von Gemmingen in 1550.

When the old Gemmingen church was rebuilt in 1846/47, numerous epitaphs and grave slabs of the Barons von Gemmingen were moved from the demolished church into the castle. The slabs were placed in the courtyard and garden, where they remain today despite later proposals to return them to the new church. Two altar wings in the style of Wolgemut also came to the castle.

The grounds include a public park with landscaped gardens that are freely accessible to visitors. The maintained outdoor spaces allow for a pleasant walk around the building and create comfortable spots to linger.

The gravestones in the courtyard and garden came from the old Gemmingen church, demolished for the 1846/47 rebuild. Two altar wings in the style of Wolgemut were also moved into the castle. Plans to return the weather-exposed stones to the new church interior were never carried out.