Ottaviani, Giovanni an Italian engraver, was born at Rome in 1735. He visited Venice, where he studied under Wagner, and engravedl several prints. On returning to Rome he soon gained reputation, and became highly esteemed. His principal work was his collection of engravings after the pictures by Raphael in the Loggio of the Vatican, of which, the first part appeared. in twelve numbers (Rome, 1769-1770, fol.); the second in thirteen numbers (1776). Among his other prints the following are most noted, St. Jerome with a Crucifix, after Guercino, St. Cecilia; and Angelica and Medora; and twenty-three plates from the paintings by Raphael in the Vatican.