Giovanni Antonio de' Rossi (1616–1695) was an Italian architect of the Baroque period, active mainly in Rome.
[1] That same year, he designed the renovations to Chiesa di San Rocco all'Augusteo, adding a dome, the sacristy and a new chapel.
[3] At about the time he became the architect of the Monte di Pietà in Rome until his death and built its oval chapel from the 1650s onwards.
For Pope Clement X he carried out an extensive and hurried refurbishment (1670–76) of the family's Palazzo Altieri near the Church of Il Gesù .
He erected the church of Santa Maria in Campo Marzio in 1682-1685 and was involved in the design of the Cappella Lancellotti in St John Lateran.