A church at the site of current Santa Marta was present by the 13th century, originally dedicated to St Calimero. In 1386, it housed the flagellant Confraternity of the Disciplini of St Marta, who added a hospice and rededicated the church. The church has been refurbished over the centuries. The facade dates to 1720–1730.
The interior ceiling has a late 17th-century fresco, depicting the Glory of St Martha, by Giovanni Battista and Carlo Pozzo, and the church houses a 17th-century processional statue on the main altar of the Madonna of the Rosary and Child. The altar has 16th century marble sculpture busts of the apostles; the altar was refurbished in 1816 likely by Giuseppe Bovara. The lateral altars have statues of Santa Marta and San Antonio di Padova.References:
Sirmione castle was built near the end of the 12th century as part of a defensive network surrounding Verona. The castle was maintained and extended first as part of the Veronese protection against their rivals in Milan and later under the control of the Venetian inland empire. The massive fortress is totally surrounded by water and has an inner porch which houses a Roman and Medieval lapidary. From the drawbridge, a staircase leads to the walkways above the walls, providing a marvellous view of the harbour that once sheltered the Scaliger fleet. The doors were fitted with a variety of locking systems, including a drawbridge for horses, carriages and pedestrians, a metal grate and, more recently, double hinged doors. Venice conquered Sirmione in 1405, immediately adopting provisions to render the fortress even more secure, fortifying its outer walls and widening the harbour.
Thanks to its strategical geographical location as a border outpost, Sirmione became a crucial defence and control garrison for the ruling nobles, retaining this function until the 16th century, when its role was taken up by Peschiera del Garda.