Castle Friedlingen, Medieval castle in Weil am Rhein, Germany.

Castle Friedlingen is a vanished water castle; nothing of the structure survives. It stood at the foot of the Leopoldshöher Rain, west of Sternenschanzstraße between Weiherweg and Lustgartenstraße in Weil am Rhein, surrounded by ponds, old trees and two Rhine islands.

Ötlikon was first documented in 1280 and passed as a Rötteln fief to the Basel Münch von Münchenstein family by 1311. The Basel earthquake destroyed the castle in 1356; Konrad Münch sold it to Margrave Rudolf of Rötteln in 1368 for 1,400 guilders. Basel troops burned it in 1445 during the Old Zürich War. Rebuilt in 1561, it was renamed Friedlingen in 1650, occupied and partly destroyed by French troops under Marshal Créquy in 1678, and finally destroyed after the Battle of Friedlingen on 14 October 1702.

The name Friedlingen replaced Ötlikon in 1650, chosen by Margrave Frederick V of Baden to mark the Peace of Westphalia. Before that the castle was also called Ottlingen. Nothing of the water castle remains today; its site lies west of Sternenschanzstraße, between Weiherweg and Lustgartenstraße.

Nothing of the castle remains; its site lies in Friedlingen, west of Sternenschanzstraße between Weiherweg and Lustgartenstraße, near the Leopoldshöher Rain. Look for the street layout rather than masonry, and note that the area is now built up.

Nothing of the castle survives today; its site lies west of Sternenschanzstraße, between Weiherweg and Lustgartenstraße in Weil am Rhein. The name Friedlingen replaced Ötlikon in 1650, chosen by Margrave Friedrich V. of Baden to mark the Peace of Westphalia.