Giovanni Alberti (Rome, 1558–1601) was an Italian painter, known for his perspective painting (quadratura).

[1] He went to Rome during the papacy of Gregory XIII, who employed him in the papal palace on Monte Cavallo, and in the Vatican.

He was also employed by Clement VIII, to paint the sacristy of St. John of Lateran, and, in conjunction with his brothers, to decorate the Sala Clementina in the Vatican.

For this work, which was commenced in 1595 and completed in 1598, the two painters (Alessandro had died during the course of execution) received 3050 scudi.

[1] In the 1590s Giovanni and Cherubino painted frescoes in the Capella Maggiore of San Silvestro al Quirinale, where the complex perspectival effects include a trompe-l'œil oculus above the altar.