After travelling throughout Italy and Germany from 1846-1852, he opened his first shop on Krongasse in Lucerne in 1852. in 1859 Maestrani moved his business to Multergasse in St. Gallen and to advertise his products, he bult the so-called "marble house" in the middle of the old town.

In 1884, the company acquired the building of a former spinning mill in the St. Georgen neighbourhood of St. Gallen, to which production was relocated a year later.

The troubled "Maestrani Schweizer Schokoladen AG" was successfully restructured in 1923 by the creditors' trustee Jakob Guyer.

[2] The Maestrani company was widely known early on, the Italian king Umberto I appointed it his purveyor to the court.

[6] The chocolate factory in Flawil includes a visitor center and a museum, named Maestrani's Chocolarium.

[8][9] At the same time, the chocolates have been sold abroad exclusively under the Maestrani name since 2008, since a brand like "Minor" (English "unimportant") or "Munz" can hardly be marketed in the Anglophone or Francophone world.