The story
Founded by Giovanni De Agostini in 1901, in Rome.1
The geographer Giovanni De Agostini, brother of the Salesian explorer Alberto Maria de Agostini, founded the De Agostini Geographical Institute in Rome in June 1901 and published a school atlas, that same year the first shop was inaugurated. In 1904, he started the publication of the Atlante de Agostini Calendar, a small volume with geographical news combined with the annual calendar.
From Wikipedia’s article on De Agostini, shared under CC BY-SA 4.0.5
