Landeck Castle, Medieval castle in Klingenmünster, Germany.

Landeck Castle is the ruin of a hill castle southwest of Landau near Klingenmünster. Its visible architectural features point to construction around 1200. The site includes a restored bridge leading to the castle courtyard and a 25-metre-high bergfried, the tallest fully preserved keep in the Palatinate, with an internal wooden spiral staircase.

Landeck is first documented in 1237, when the Leiningen estates were divided and the castle fell to Count Emich IV, founder of the Leiningen-Landeck line. By the mid-13th century it was an imperial fief held jointly by the counts of Zweibrücken and Leiningen. In 1525 peasants of the Alsatian Kolbenhaufen stormed and burned it during the Palatine Peasants' War; the damage was repaired. Its destruction by French troops probably occurred around 1680, not 1689 as commonly stated.

The name Landeck comes from the Leiningen-Landeck line founded after the 1237 partition of Leiningen lands. Each year on the last June weekend the Landeckfest, described as the Palatinate's oldest medieval castle festival, is held in the ruins; a medieval Christmas market follows on the third Advent weekend.

The castle is open daily except Tuesdays, from 11:00 to 18:00 in winter and to 22:00 in summer. The 25-metre bergfried, the tallest fully preserved keep in the Palatinate, is climbed via an internal wooden spiral staircase. The castle tavern in the courtyard, run by Burg Landeck Gastro GmbH, closes on Tuesdays.

The castle's 25-metre bergfried is the tallest fully preserved keep in the Palatinate; a wooden spiral staircase inside leads to its crenellated top, and the first floor holds a small display of finds from the grounds. The Landeckverein, founded in 1881, has long worked to maintain the site.