The Stemmario Bosisio, once known as the Scotti Armorial, now bears the name of the donator who willed it to the Historical Archives of the Dioceses of Como. This is a heraldic manuscript with watercolour illustrations that dates back to the second half of the 18th century. It documents 972 coats of arms of families and communities, mostly of the Lombardy region; particularly well represented are the region of Lake Como and the surrounding valleys (Valtellina, Valchiavenna, Val d’Intelvi, Valsassina), Brianza, and also the Canton Ticino and the Canton Grigioni.
This prestigious edition is enhanced by the blazons of the well-known Swiss heraldic expert, Carlo Maspoli; the genealogist Francesco Palazzi Trivelli, archivist of the State Archives of Sondrio, has contributed valuable brief historical notes for many families.