[2] In 1688 it was purchased by Queen Marie Casimire, the consort of John III Sobieski, to be transformed into a church to serve the Benedictine Sisters of Perpetual Adoration of the Most Holy Sacrament, whom she had brought to Poland.

Between 1718 and 1721 the trompe-l'œil altars of St. Casimir and Virgin Mary were sponsored by Michał Kazimierz Radziwiłł, voivode of Vilnius.

[3] In 1718 the church furnishing was completed with a profuse late baroque pulpit in the shape of a flower and between 1745 and 1748 with a rococo organ.

Inside, the most valuable element of the original church's decoration are the preserved fragments of a brilliant tomb monument of Maria Karolina Sobieska de Bouillon carved by Lorenzo Mattielli in white and black marble in 1746.

[3] The effigy of the founder in an oval frame was placed atop the plinth with the Janina coat of arms and a royal crown.