The Church of Our Lady was initially dedicated to St. Michael. Its original form dates from the year 1439, and in the 17th century it was restored. Hence its exterior and interior are significantly baroque.
Next to the central altar from the 18th century, there is a painting of Mary with the Child. The church is richly decorated with four paintings representing the stages in the life of St. Augustine. They were initially attributed to F. Fontebasso, but today they are considered to be the work of G. Agnelli, a pupil and successor of the great Piazzeta. The wall intarsia and the wooden frame, made by the Venetian carver Brustolone, are also worth mentioning.References:
The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.