The Milanese Engineer Franco Soresini, an expert and enthusiast of the radio, telecommunications and information technology, in 1993 granted to the Marconi Foundation his vast collection of documents, that today still constitutes the heart of the documentary archive of the Foundation.

The Soresini collection includes a heterogeneous set of materials with important and original characteristics that are equally as heterogeneous. It is made up of manuscripts, rare photographs of the Marconi family and other more well known photographs of Marconi as an established public figure, stamps and postcards on various themes, medals and coins commemorating important events connected to Marconian inventions, miscellaneous documents (original and copies) taken from diverse sources that account for manifestos, writings, reports, studies and research, catalogs, etc. relevant to Marconi and other scientists (his predecessors) and, lastly, newspapers and magazines as well as clippings dedicated to Marconi.