Largo di Torre Argentina is a square that hosts four Republican Roman temples, and the remains of Pompey's Theatre. The name of the square comes from the Torre Argentina, which takes its name from the city of Strasbourg, whose Latin name was Argentoratum.
The four temples, originally designated by the letters A, B, C, and D, front onto a paved street, which was reconstructed in the imperial era, after the fire of AD 80. The area was delineated to the north by the Hecatostylum (one-hundred columns porch) and the Baths of Agrippa, and to the south by the buildings related to the Circus Flaminius, to the east by the great porched square of Porticus Minucia Frumentaria, and to the west by the Theatre of Pompey.
Julius Caesar was killed in the Curia of the Theatre of Pompey, and the spot he was believed to be assassinated is in the square.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.