Santa Caterina a Magnanapoli is a 16th-century church in Rome. It is devoted to St. Catherine of Siena, and is located on the Quirinal Hill, in piazza Magnanapoli.
The first church was first built ca. 1575 and originally belonged to an adjacent convent (built ca. 1568 by Pope Pius V) of Dominican tertiary nuns, which today houses the Pontifical University of Saint Thomas Aquinas, Angelicum of the Dominican Order. Construction of the present church began in 1608, initially at expense of Cardinal Scipione Borghese to a design by Carlo Maderno, and stopped first in 1613. Meanwhile, the monastery acquired the Torre delle Milizie in 1619.
When work restarted 1628, it was probably intended to continue according to Maderno's design, but he died the next year, and Giovanni Battista Soria was commissioned to complete the church. He made changes to Maderno's design, how much unknown, since the original plans are not known. Between 1631-1641, (when the present facade was completed. The Chigi family heraldic symbols of then Pope Alexander VII are featured in the balustrade.
The whole convent, except for the tower, was demolished in 1924. The Military Ordinariate, whose headquarters are adjacent to the church, took over the church, and it is now served by diocesan clergy. A restoration occurred in 1992.
In the corridor leading to the sacristy are remains of frescoes by Antoniazzo Romano and pupils, produced for the room of St Catherine of Siena and placed in a now demolished oratory behind the church some time after 1637. Among the saints shown as St Bridget of Sweden and St Catherine of Alexandria.