A Pro Castle, Castle in Seedorf, Switzerland

A Pro Castle is a moated water castle in Seedorf in the canton of Uri, built in 1556 by Jakob a Pro. The main building stands beside a former economy building that has housed the Uri Mineral Museum since 1981; a castle restaurant opened in 2009.

Jakob a Pro, admitted to Uri citizenship in 1513 and land treasurer, built the moated castle in 1556 after serving as mercenary recruiter in Piedmont; he became bailiff of Baden that same year. His son Peter a Pro later became Landammann of Uri. The canton of Uri bought the castle in 1959 from the family entail and uses it for government meetings.

The former economic building (Ökonomiegebäude) of the castle has housed the Uri Mineral Museum since 1981, showing minerals from the canton's Alpine valleys. Since 2009 a castle restaurant has also operated in the complex. The castle itself belongs to the canton of Uri, which bought it in 1959 from the A Pro family fideicommissum.

The castle stands in the municipality of Seedorf in Uri, and the former economy building has housed the Uri Mineral Museum since 1981. A castle restaurant has operated since 2009. The canton of Uri has owned the building since 1959, and it serves the cantonal government for representative meetings.

The castle was built in 1556 by Jakob a Pro, who had entered Uri's land law in 1513 and served as Landvogt in Baden that same year of construction; his son Peter became Landammann of Uri. Both had earlier worked as mercenary leaders and recruiters in Piedmont.