Margaretenkirche, Protestant church in Aldingen, Germany

The Margaretenkirche is the Protestant church of Aldingen, built in the late Gothic style by Hans von Ulm and completed in 1500, as the eastern keystone of the choir vault records. Its square west tower has red-brown corner quoins, two small louvered arched windows and a dark panel with gold lettering, and is topped by a steep pyramidal spire. The interior holds twenty-four tomb monuments of the Lords of Kaltental.

A church existed in Aldingen by 1100, when Winther von Oßweil gave it to Hirsau Abbey, the first documentary mention of the village. Around 1318 the Kaltental family made it part of a walled church castle. Hans von Ulm built the late Gothic church, finished in 1500 as the eastern keystone of the choir vault records. French soldiers plundered it in 1693, stealing the bells.

The church is named after Saint Margaret of Antioch. The Lords of Kaltental used it as their residence church and burial place, which is why it holds twenty-four tombstones and other works from their rule. The choir vault's western keystone carries the Kaltental coat of arms, while the eastern keystone records the year 1500.

The church stands within the walled former church-castle precinct; parts of the ring wall and the Pfaffenhaus, built around 1318, survive alongside it, while the Aldinger Schlössle was lost after an 18th-century fire. The south side of the nave carries an outside stair to a gallery added in 1633. The 2012 renovation gave the interior a new altar designed by Werner Mally.

The completion date is recorded not on the tower but on the eastern keystone of the choir vault, which carries the year 1500; the western keystone of the same vault shows the coat of arms of the Lords of Kaltental. The church was built to a single plan by Hans von Ulm.