where: Via del Quirinale, 23
getting there: nearest metro stop Linea A/Repubblica
hours: Tuesday to Saturday 10:00-13:00, Sunday 12:00-13:00 (during mass at 11:00 sightseeing is not recommended)
The church was designed by Borromini in 1634 and funded by Cardinal Francesco Barberini who lived in the nearby Palazzo Barberini.
The church is mainly visited by those interested in architecture as this was Francesco Borromini's first independent commission in Rome.
The main altarpiece is by the 17th century French painter Pierre Mignard and depicts Saint Charles Borromeo, the church's namesake.
On the right of the main altar is the Ecstasy of St Michael, work of female artist Amalia de Angelis, dating from 1849.