A chapel at villam Ratehtim was first mentioned in an 1177 deed, then part of the Millstatt Abbey estates within the Duchy of Carinthia; it was raised to a parish in 1262. Since the Middle Ages Radenthein had been an iron ore and garnet mining area and the site of a finery forge, even the use of reverberatory furnaces is documented since the late 18th century.
A chapel at villam Ratehtim was first mentioned in a 1177 deed, then part of the Millstatt Abbey estates within the Duchy of Carinthia; it was elevated to a parish in 1262. Since the Middle Ages Radenthein had been an iron ore and garnet mining region and the site of a finery forge, even the use of reverberatory furnaces is documented since the late 18th century.