The Detmold Open-air Museum (German: LWL-Freilichtmuseum Detmold – Westfälisches Landesmuseum für Volkskunde; English: "LWL Open-air Museum Detmold – Westphalian State Museum for Folkloristics") is a museum at Detmold in the Ostwestfalen-Lippe region of North Rhine-Westphalia, Germany. It was founded, together with the Hagen Open-air Museum, in 1960, and was first opened to the public in the early 1970s. The museum is run by the Landschaftsverband Westfalen-Lippe (LWL, regional authority for Westphalia and Lippe within North Rhine-Westphalia).