Unterspaur, Cultural heritage monument in Tramin an der Weinstraße, Italy.

Unterspaur is a former noble residence in the municipality of Tramin in South Tyrol, rebuilt from the ground up after a village fire in 1796. In its northern part it contains the Margarethenkapelle, a chapel installed in the second half of the 15th century. The building has been listed as a protected monument since 3 March 1951.

A Gothic predecessor is said to have been built in the 14th century under Margaret of Gorizia-Tyrol (Margarethe Maultasch); in the second half of the 15th century the Margarethenkapelle was inserted in the northern part. In 1464 Emperor Frederick III granted Hans von Spaur and his sons Pankraz, Daniel and Hans imperial exemption for Unterspaur, confirmed by Maximilian I in 1501. A village fire in 1796 destroyed the building, which was then demolished and rebuilt from the ground up, losing its furnishings.

The name Unterspaur comes from the Counts of Spaur, who owned the estate alongside the neighbouring Ansitz Langenmantel; the related Ansitz Oberspaur no longer exists. In the second half of the 15th century the Margarethenkapelle was built into the northern part of the Gothic predecessor building.

Unterspaur is a private residence in Tramin and cannot be visited inside; the building is seen from the public road through the village. It stands in the built-up area of the village, so it can be reached on foot from the centre. The 1796 village fire destroyed the earlier building, so the present house is a reconstruction.

The 1796 village fire destroyed Unterspaur's original furnishings, so the rebuilt house preserves no medieval interior. Its neighbour, Ansitz Oberspaur, was only patched up with an emergency roof after the same blaze and no longer exists; Unterspaur is the sole survivor of the pair.