The Hadnmauer is the protected ruin of a letzi (defensive barrier across a valley) in the Gailtal valley in Austria, dating to the Late Antiquity [1]. It runs from Rattendorf to Jenig [1]. Originally 1.6 kilometres long, only 336 metres survive [1]. On its western side, rooms for the defending personnel are discernible [1].
Text: Wikipedia – 'Hadnmauer' (revision of 2026-05-12), CC BY-SA 4.0 · sentences selected and shortened by an AI system · source →Hadnmauer

Also known as: Römische Talsperre Hadnmauer, هادنماور
| Type | Wall |
|---|---|
| Period | 1 - 500 AD |
| Country | Austria |
| Coordinates | 46.6166° N, 13.2457° E |
Austria