What is "wasenbourg"

Wasenbourg , located 400 metres in height on the northwest hillside of Reisberg, is a ruined castle in the North Vosges. Although its origins are fairly obscure, the historians attribute generally its construction, by 1273, to Conrad de Lichtenberg, then bishop of Strasbourg. The castle is located on the territory of the commune of Niederbronn-les-Bains.