Gaspare Fossati (1809-1883) and his brother Giuseppe Fossati (1822-1891), were born in Switzerland to a family of architects.
They studied in Venice and Milan.
Until 1833 Gaspare had studied several specimens of Romanic and Renaissance architecture.
He participated in the excavations in Pompey, and subsequently travelled to Russia, where he was soon appointed official architect to the Czar's court in Saint Petersburg, and was entrusted with designing the Russian embassy in Istanbul.