The Roman circus of Mérida was used for chariot racing. It was modelled on the Circus Maximus in Rome and other circus buildings throughout the Empire. Measuring more than 400 m in length and 30 m of width, it is one of the best preserved examples of Roman circus. It could house up to 30,000 spectators.
There is no consensus about the circus' dating, as it was built and used for several years before its official dedication. It seems to have been built sometime around 20 BC and inaugurated some 30 years later. It was located far outside the city walls, but close to the road that connected the city to Toledo and Córdoba.
After the fall of the Western Roman Empire and the rise of Christianity in Spain, the circus saw more use than the other Roman structures of Mérida, since racing was considered less sinful than spectacles performed in the Theatre and the Amphitheatre.
Mérida's circus remains very well preserved with numerous structures, including the Porta Pompae ('main entrance'), the Porta Triumphalis ('triumph gate'), the spina (the longitudinal wall), the tribunal iudicium ('tribune of the judges'). A museum dedicated to the circus now sits near the middle edge of the circus grounds and it allows admittance into the fenced area around the circus remains.
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.