This turn-of-the-century villa, known as the 'red house', or 'angel's castle' because of its statue of St. Michael, was built by the altar builder and manufacturer Josef Runggaldier, living in the 'Blue House' next door, for his son Josef Jr. and was equipped with its own workshop on the ground floor. It is still used as an atelier today by sculptor Hermann-Josef Runggaldier, a great-grandson of the original constructor.

In 1887, altar builder Josef Runggaldier Sr. constructed Villa Stillheim in historical country house style on a plot of land belonging to Poz Dessot farm. The façade lending the villa the name of 'Blue House' (Ladin Cësa Bruma) was inspired by business trips to Hungary. Around 18 artisans were working in the firm at Pasperg/Runggaditsch around 1900, and the altars produced there were exported abroad and awarded numerous prizes.