His first studies were with his father, the
court painter, . Then, at the age of fifteen, the
Benedictines awarded him 900
Guilders to study in Rome, where he attended at the
Accademia di San Luca under
Sebastiano Conca and, from 1713–14, lived in a room attached to the workshop of the sculptor
Pierre Le Gros the Younger. He took further training in Venice with
Giovanni Antonio Pellegrini and returned to Germany in 1718. Initially, he worked at
Ottobeuren Abbey or in
Füssen at
St. Mang's Abbey, where he created ceilings and altarpieces. In 1725, he was appointed
court painter by , the
Prince-abbot. In the State Rooms of the Fürstäbtliche Residenz (a monastery complex), he painted the ceilings and walls as well as portraits of former Prince-abbots in the Residence Hall. He spent the years 1740 to 1742 painting the banquet hall at the "Ponikauhaus", an official residence for the Prince-abbot. In 1757, he produced his most extensive works for the library at
Schussenried Abbey. Overall, very few major religious structures within a twenty-mile or 30 km radius of Kempten are without
frescoes, altarpieces or other works by Hermann. ==Frescoes from the Schussenried Abbey library==