Gabrielli a heretical prelate, lived in the latter half of the 17th century. He belonged to the Roman branch of the Gabrielli family. Actions both foul and strange have been imputed to him, such as making sacrifices of human blood at the reunions of his friends. Francis Picchitelli, called also Cecco Foligname, had been sent to assassinate the marquis of Buffalo, but the emissary being seized, exposed his accomplices, among them Gabrielli, who was confined in a convent of Monte Cassino, and deprived of his income. Afterwards he was conducted to the chateau of Perugia by the order of Innocent XI. See Hoefer, Nouv. Biog. Generale, s.v.