Santa Maria Assunta, Baroque church in Ariccia, Italy

Santa Maria Assunta is a Baroque church in Ariccia with a circular plan and a ribbed dome on a tall drum, its lantern topped by a cross. A two-storey portico with three arches and a triangular pediment fronts the church; the upper balustrade reads "SIGISMUNDVS CHISIVS IN FOROMPOPVLORVM". The interior has six lateral altars and a dome decorated by Bernini's studio.

A collegiate church existed in Ariccia perhaps since the 6th century, on the site of San Nicola di Bari. The Chigi family, who bought the fief in 1661, commissioned Gian Lorenzo Bernini to build the present church between 1663 and 1665; it was consecrated on 16 May 1664. Pope Alexander VII ordered the old collegiate church demolished on 27 April 1665, and part of it became the church of San Nicola di Bari.

The name Santa Maria Assunta refers to the Assumption of Mary, a theme reflected in the paintings and sculptures filling the interior. These artworks serve as visual prayers, helping visitors connect with the religious message of the space.

The church faces the piazza across from Palazzo Chigi, with the two 1771 wings forming a two-storey portico on either side of the entrance. The interior is a circular hall under the dome, so a walk around the six lateral altars covers the whole space. The pavement mosaic was relaid in 1956 in two colours of marble.

The two wings that curve around the church were added in 1771 for Prince Sigismondo Chigi, after Bernini's time; their two-storey porticoes carry his name, SIGISMUNDVS CHISIVS IN FOROMPOPVLORVM. The same works replaced the original cornice text Beatae Mariae Virgini Dei Matri in Caelum Assumptae with Deiparae in Coelum Assumptae, the wording visible on the entrance pediment today.