The Roman city of Cáparra is located in the valley of the River Alagón. In Roman times it was in the province of Lusitania within the Conventus Iuridicus Emeritensis, whose capital was Colonia Augusta Emerita (modern day Mérida). It was approached via the Roman road known as the Vía de la Plata and is now permanently abandoned.
Its excellent location led to Roman settlement achieving the category of municipium under Vespasian, around the year AD 74. From that point on, Cáparra really began to develop as a city. Its decline took place during the High Middle Ages, when it began to lose its population, becoming even more depopulated after the Moorish invasion.
The most representative element of this ancient Roman city is its tetrapylon or quadrifons arch, i.e. a four-gate arch. This arch was found in the centre of the city, crossed by the Roman Silver Route.
The tetrapylon arch has large ashlar foundations with a dressed stone finish, while the capitals finish in a cornice supporting an archivolt that in turn supports the groin vault. This arch is the only one of its kind in the Iberian Peninsula.
The Roman bridge of Cáparra is part of the monumental site of Cáparra. The work is not established in time and consists of four arches, of which only the central two can be considered fully Roman.
The arches are rounded and the vaults come out from a projecting course. Upriver, one of the cutwaters of the piles in the river’s course is triangular and the other trapezoidal, while the downstream face is flat. The work is clad in granite masonry arranged in somewhat irregular rows.
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.