The new foundation was made in 1728 by a stateswoman Elżbieta Sieniawska following the plan of her private architect Karol Antoni Bay.

[3] In front of this late-baroque church stands a statue of Cardinal Stefan Wyszyński,[4] primate of Poland from 1948 to 1981.

The nave with main altar and 6 side chapels in Baroque style are embellished with rich Rococo decorations.

There is an impressive and unique pulpit in a shape of boat and also a lot of old sculptures, paintings by old Polish, Italian and French masters (including Saint Louis de Gonzaga by Daniel Schultz),[5] portraits of famous and noble Poles and tabernacle made of ebony and silver.

This exceptional tabernacle, which initially was placed in the chapel of Villa Regia Palace in Warsaw, was donated to the church by Queen Marie Louise Gonzaga de Nevers in 1654.