Dreifaltigkeitssäule, Religious monument in Alter Platz, Klagenfurt, Austria.

The Holy Trinity Column is a tall stone monument standing in the center of Alter Platz, featuring intricate carved reliefs and religious figures. The structure consists of limestone and is adorned with religious scenes and sculptural details throughout its height.

The Holy Trinity Column was first erected in wood in 1680/81 on Heiligengeistplatz, where the town hospital and oldest cemetery stood, as thanks by the Carinthian estates and population for the land being spared from the plague. After the 1683 siege of Vienna and the Ottoman defeat, it was replaced from 1689 by a stone version that also took on the character of a victory column, crowned by the cross above a defeated crescent. In 1897 it was moved west for the fish market hall, and in 1965 it was relocated to Alter Platz.

The column was commissioned by the Carinthian estates as a plague votive and later became a victory monument: a crescent moon lies under the Christian cross on top. The marble relief of the Gnadenstuhl with the Holy Spirit on the east side of the base carries plague-related inscriptions with a chronogram.

The monument stands in Alter Platz, a lively pedestrian area surrounded by shops and cafes where visitors naturally gather. From this central location, it is easy to explore other historic sites and attractions throughout the city center.

The column stands where the Johannes-Nepomuk column once stood, blown up in 1874; its founder was the Klagenfurt burgrave Wolf Siegmund von Rosenberg, and statues recovered from the rubble are kept in the arcades of the cathedral facade.