The construction of Roman temple in Córdoba began during the reign of Emperor Claudius (41-54 AD) and ended some forty years later, during the reign of Emperor Domitian (81-96 CE). Presumably it was dedicated to the imperial cult. The temple underwent some changes in the 2nd century, reforms that coincide with the relocation of the colonial forum.
In the area had already been found architectural elements, such as drums of columns, capitals, etc. all in marble, so the area was known as los marmolejos. This area of Córdoba could become between the 1st century and the 2nd century, as the provincial forum of the Colonia Patricia, title that received the city during the Roman rule.
The building was situated on a podium and consisted of six columns on its front facade and ten columns on each side. Currently, the only remains left of the building are its foundation, the stairs, the altar and some shafts of columns and capitals.
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.