Сант-Андреа-делла-Валле
Born in Rome to Rafael Leonori and Anna Ianari, he entered the Roman College at the age of 8, and in 1875, at the age of nineteen, he graduated with a degree in civil engineering. He mainly worked in building churches and religious structures. Among these, he designed the chapel of "Our Lady of the Sacred Heart" in the famed Sant'Andrea della Valle in Rome.