Construction on the church was begun in 1602, headed by architect F. Bigallo. The church was open to the public in 1608. Construction was continued by the Jesuits, who took over ownership of the church and the adjacent monastery (now a public school). The unfinished classical facade presents four large fluted, marble pilaster strips, and a window in the Sangallo-Palladio style, beneath which lies a marble tablet with the church’s mission inscribed on it. The single-nave interior with lateral chapels is covered by a barrel vault ceiling, as commonly used in congregational churches. The church’s ornate altars, friezes and stuccoes represent Cremona’s greatest example of Baroque architecture. In particular we may note: two confessionals with a tablet attributed to Genovesino (17th century) and a wood panel by G. Bertesi (17th century); a canvas on the third altar by A. Massarotti depicting St. Joseph and the Christ Child; the rear of the presbytery features the monumental altarpiece with leaf engravings and architectonic fragments attributed to G. Bertesi (17th century) containing two canvases – one anchored depicting St. Marcellino and Peter the Exorcist baptizing Paolina, the jailor’s daughter, by G. Gatti (1604), and the other rolled and mobile by A. Bonisoli (17th century); the complex Baroque setting is completed by the main altar by G. B. Zaist (18th century) and two canvases by A. Massarotti depicting St. Marcellino and St. Peter arriving to free Cremona under siege by the Milanese and The conveyance of the remains of the two saints from the Church of St. Thomas to the Cathedral.