Former Ittingen Charterhouse, Former Carthusian monastery in Warth-Weiningen, Switzerland

The former Charterhouse is a monastic complex with museums, gardens, guest accommodation, and dining options situated within medieval stone walls and courtyards. The site integrates art exhibitions, residential spaces, and public areas within this historic structure.

Ittingen was founded in 1150 by the last three members of the lords of Ittingen as an Augustinian canons' house, with the Bishop of Konstanz and the Welfs involved and the Count of Kyburg as advocate. In 1461 the impoverished house was sold to the Carthusians, who rebuilt it extensively; formal admission to the order followed in 1471. On 18 July 1524 the Ittingersturm left it plundered and burnt, and rebuilding came only in 1553 under the Counter-Reformation. The canton dissolved the monastery in 1848.

The name Ittingen comes from the noble family that held the castle here from the 8th to the 12th century. When the Carthusians took over in 1461, their rule closed the church to the laity, and women in particular were barred; the women of Warth responded with a sit-in that won them their own chapel in the village. Today the site holds the Ittinger Museum and the art museum of Canton Thurgau.

The complex lies on gently sloping ground at the western edge of Warth, in the municipality of Warth-Weiningen. The main white-walled building with its red-brown tiled roof and slender spire holds the museums, hotels and restaurant Zur Mühle; the separate timber-framed building in front stands apart from the monastic wings. The site is reached by road from Frauenfeld, and the buildings are spread over several wings, so allow time to walk between them.

In September 1912, during the Kaiser Manoeuvre, Kaiser Wilhelm II visited owner Victor Fehr at the charterhouse; a flush toilet was installed for his comfort, said to be the first of its kind in the complex and rare in Switzerland at the time.