 From 1604 until the secularization in 1803, the augustinian canons regulars in charge of the cloister Rottenbuch also supervised the pilgrimage to the Hohen Peißenberg.The large ceiling fresco by Matthäus Günther inside the chapel of Mercy also depicts the committal of the pilgrimage site to the cloister Rottenbuch.It was the Augustinian monks who also carried out the first meteorological observations on the site and these have been carried out continuously since 1781, making Hohenpeißenberg Meteorological Observatory the oldest meteorological station in the world.