The mansion and the castle differ less by their inhabitants than by their function. The manor is always the center of the estate as the manor, winery or nobility, so to speak, a historic farm, a Gutsherrschaft. The squire - who could have come from the nobility, but did not have to - was not only landowner and employer, but could also speak lawfully on his estate. The differences between mansion and castle therefore lie in the functional area: The small estate of a nobility gentleman has only one mansion, the manor house of a noble landlord can also be called a castle. If a noble castle serves merely representative purposes and is not part of a manorial estate, it is not a mansion. If the manor of the nobility gentleman is particularly large and equally artistic, it is usually colloquially referred to as a castle.