Institut auf dem Rosenberg is a private international boarding school located near Lake Constance in St. Gallen, Switzerland. Founded in 1889, it is one of the oldest boarding schools in Switzerland and reportedly the most expensive school in the world. As of 2025, it has a tight-knit student body of around 280 students drawn from 60 nationalities. It has educated diplomats, oligarchs, world leaders, Nobel laureates, and generations of global aristocracy and industrial dynasties, and has been referred to as the "davos" for children".