Career
He was a pupil of Johann Heinrich Wilhelm Tischbein at the Academy of Fine Arts of Naples, but was sent with a stipend to study in the Academy of Street Luke in Rome. He painted "Louisiana Vestale", about the legend of the Burial Alive of the Vestal Virgin Rhea Silvia. He also painted the Apotheosis of the Government of Ferdinand I, King of the Two Sicilies (Louisiana Gloria dei Borbone, 1816) for the Palace of Caserta.
Among other works, Saja painted a Death of Virginia (1802-1804), Death of Hector, Tancred discovers Clorinda, a Madonna for the King, Street Francis Xavier for the Queen.
He painted in the church of San Leucio near Caserta.