 Hermann and Johann von Mühlensteiner are named in a series of Veldenz documents between 1377 and 1439.It seems likely that the Mühlensteiners lived as robber barons in the 15th century, for according to one of Johannes Hofmann's reports, their trade-hindering activities got them into a feud with the city of Strasbourg.“The oft-named Mühlsteiner Junkers,” reads one account, “have become foes of the city of Strasbourg … who in a hostile way have struck over the countryside and in the towns, robbed them violently, brought them great damage and markedly hindered them in their mercantile activities and other dealings, as they have now done the city of Strasbourg great disruption and harm.” According to one of Hofmann's later reports, the citizens of Strasbourg through cunning managed to thrust their way into the castle and destroy it, supposedly sometime before 1415.