The Church of San Esteban de Aramil is of the Romanesque style, popular between the 10th and 13th centuries, but the church itself cannot be dated more exactly. It was first mentioned in documents from 1240 concerning a donation of goods to the monastery of Valdediós by Alvar Diaz and his wife.
There are two theories concerning its origin; one is that it is the last remaining remnant of a monastery and the other is that it is a nobleman's church, which would have served both as the chapel for the castle and the church for the neighboring town.
The church has the classic features of Romanesque architecture; it has a rectangular nave terminated at the southern end by a semicircular apse. Sculptural ornamentation of the church includes the doors, located on the western side of the church and in the apse. The west door has a semicircular arch with two semiarches and screens that rely on separate columns. These columns are formed by shafts supported on bases that have carved lilies forming the columns' capitals, which are decorated with plant motifs. The southern section is less important in addition to being smaller although it is similar in design to the western door. The decor includes protruding sculptured heads, of Norman origin, showing various imaginary animals. There is a small central window in the apse.
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.