Santa Maria in Vallicella, also known as Chiesa Nuova, is a church in Rome, Italy. The church was built in the 16th century by the Oratory of Saint Philip Neri, a society of secular clergy. The church is located in the historic center of Rome, near Piazza Navona and the Pantheon.

The façade of the church, designed by Martino Longhi the Elder, is one of the most notable examples of Roman Baroque architecture. The interior of the church is also richly decorated in Baroque style, with works by several prominent artists, including Carlo Maratta, Guido Reni, and Nicolas Poussin.

The church is dedicated to the Virgin Mary and is also known as the Mother Church of the Oratorians. The church is still used by the Oratory of Saint Philip Neri for their liturgical celebrations and spiritual exercises.

Santa Maria in Vallicella is also home to the Oratorio del Gonfalone, a small chapel decorated with frescoes by Giovanni Lanfranco, one of the most important Baroque painters in Rome.