The Kränzelstein tower is thought to have been built in the 13th century as a servant's residence by the Counts of Eppan. The mighty residential tower on the eastern edge of the village stands on a rectangular ground plan, 11.5 by 9.5 metres, and originally had only two storeys above the cellar room.

The tower is named after Hans von Chranzenstain, who owned the castle according to a document from 1362. The lords of Stet, a lord of Luttach and the Sarentino court lord Arnold von Niederthor appear among the later owners, as do the lords of Northeim, who called themselves the Sernteiner.

At the beginning of the 16th century, Kränzelstein was extended and enlarged significantly: the tower was raised, an extension was built on the mountain side and on the south side an economic wing with a circular wall was built. Weapons embrasures and more windows, the beamed ceiling of the parlour on the third floor and the partition walls of the fourth floor were added.