Santa Maria della Pace was the first piece of architecture Bramante made in Rome, built on a medieval church site - it was constructed as a church to Our lady of peace due to the conflicts that were affecting Florence at the time. The Church of Santa Maria della Pace is best known for two later additions: a cloister by Bramante, finished in 1504, and a façade by Pietro da Cortona, begun in 1656. [1]
In 1656, Pietro de Cortona was commissioned by Pope Alexander VII to design the entry of the church from the street side. The design of the facade of the new church was with use of a semicirclar portico and the addition of arches. Behind the church lies Bramante’s cloister. The two stories of the cloister were designed with pilasters of different orders- the use of the ionic on the ground story and composite on the upper story while placing columns over arches. Bramante’s approach to the design of this building was to use different forms of construction between the two stories in order to create a more proportionate looking design, so the solution he came up with was to have both stories use common dimensions. Bramante created a porch of four bays at each side, there is piers on the main axis and the side entrances. The view from the interior at ground level is a succession of the two orders. The interior also holds a hidden gem - the Sibyls fresco painted by Raffaello/Raphael in 1514. In 1656, Pietro de Cortona was commissioned by Pope Alexander VII to design the entry of the church from the street side. The design of the facade of the new church was with use of a semicircle portico and the addition of arches.
Works cited:
http://www.reidsitaly.com/destinations/lazio/rome/sights/sm-pace.html