Entrance of Hallwyl Castle, one of the most important moated castles in Switzerland, located near Lake Hallwyl in Aargau.  The origins of the caslte go back to 1256, but has been renovated and changed several times since then.  For more information on the castle, check out this wikipedia page.

When we were visiting, a wedding was just taking place at the castle which is why there are so many people around on the square.