Hallwyl Castle

Hallwyl Castle is a water fortress positioned on two islands within the River Aabach and surrounded by fortified walls. The structure combines residential quarters and defensive installations, all enclosed by water in a layout typical of medieval military architecture.

Built in 1265 as a fortified residence, the castle was destroyed by Bernese troops in 1415 during the conquest of Aargau. Its reconstruction following this conflict shaped the fortress visitors see today.

The castle was the seat of the noble Hallwyl family and remains a symbol of their regional influence that shaped local history. The family accumulated artworks and furnishings over centuries that reveal how aristocratic life unfolded within these walls.

Guided tours lead visitors through the fortress and display rooms where the Hallwyl family collection is presented. It is helpful to allow adequate time for exploration, as the island location and size of the structure require walking through different sections.

Between 1910 and 1916 systematic excavations took place under archaeologist Nils Lithberg's direction. The work was supported by Wilhelmina von Hallwyl and uncovered artifacts that reveal everyday medieval life within the fortress.

Location: Seengen

Inception: 1265

Part of: list of cultural properties in Seengen, Museum Aargau

Address: Boniswilerstrasse 38.1–38.6, 5707 Seengen

GPS coordinates: 47.32315,8.19434

Latest update: December 8, 2025 19:40