Santa Maria del Popolo
Soon after its transfer to the prestigious Lombard Congregation Santa Maria del Popolo was reconstructed between 1472 and 1477 on the orders of Pope Sixtus IV. This was part of the ambitious urban renovation program of the pope who presented himself as "Urbis Restaurator" of Rome. The medieval church was entirely demolished and a new three-aisled, Latin cross shaped basilica was built with four identical chapels on both sides, an octagonal dome above the crossing and a tall Lombard style bell-tower at the end of the right transept. The result of this reconstruction was an early and excellent example of Italian Renaissance architecture in Rome. In spite of the many later changes the basilica essentially kept its Sistine form until today.
San Giacomo in Augusta
A church at the location was founded along with a hospital by Cardinal Giovanni Colonna in 1339. By 1515, the hospital was in a state of abandon, but within a few decades reopened under the supervision of two religious orders, with the aim of curing those affected by syphilis. Pope Nicholas V placed it under the control of the Company of Santa Maria del Popolo. This order was under the patronage of the Florentine Cardinal Antonio Maria Salviati, and he commissioned the reconstruction of the church. The oval layout of the church at the site was rebuilt starting by Francesco da Volterra in 1592. Upon the former architect's death, the facade and most of the interior decoration completed by Carlo Maderno in 1600.