Altenklingen Castle, Renaissance castle in Wigoltingen, Switzerland.

Altenklingen Castle is a late Renaissance castle in Wigoltingen, built from 1585 for Leonhard Zollikofer after he demolished the earlier Klingen castle. The architect Mathäus Höbel of Kempten first made a wooden model to guide the work. The castle chapel, added in the 16th century by the Zollikofer family, is dedicated to Saint Wiborada of Klingen, whose statue still stands inside.

The original fortress was built around 1200 by the Lords of Klingen and remained under their control until 1395. It then passed through multiple owners and was shaped by various noble families.

The chapel was dedicated in the 16th century by the Zollikofer family to Saint Wiborada of Klingen, and her statue still stands inside it. The castle's name and the silver lion on black of the Lords of Klingen survive in the coat of arms of Engwang, a village in the municipality of Wigoltingen.

The castle is privately owned by the Zollikofer family and has limited wheelchair accessibility to certain areas. It is wise to check in advance which parts of the building can be visited.

The castle chapel was dedicated in the 16th century by the Reformed St. Gallen councillors Zollikofer to Saint Wiborada of Klingen, and her statue still stands in it. Wiborada, born between 880 and 885, is said by the archaeologist Iris Hutter to have grown up at the Altenburg, the earlier fortress 600 metres from today's castle.