The church of Santa Cruz de Arabaldo was originally a small monastery that depended on the important Cistercian community of Oseira: its documents date it as early as the 12th century. It consists of a single nave and rectangular apse.
Its façade is Baroque, but the rest of the stonework is Romanesque. Thus, on the southern façade we find a mysterious inscription with Romanesque characters and on the cornice some corbels with geometric decoration. On the northern façade, on the other hand, the corbels have vegetal decoration, and a checkered semicircular gate appears, supported by vegetal capitals and two bovines on the brackets.
The rectangular apse is lower than the central nave. Both end in a cornice supported by corbels: the southern ones have geometric shapes and a monstrous animal, while on the northern ones there is a person drinking from a barrel, an animal that seems to be looking at us and a bird clutching an object. The head has a semicircular arched window with checkered patteern supported by capitals (some decorated with birds) on smooth columns. The apse is finished off in an Agnus Dei with a ram whose cross is missing
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.