The Church of San Juan de Berbío probably belonged to the monastery founded by Alfonso V in 1005; the Infanta Doña Urraca donated it to the Monastery of San Pedro de Eslonza in 1099.
The structure went through several redesigns in the fifteenth and sixteenth centuries. The most extensive was in the eighteenth century, which added square heads and porch trim. Of the original Romanesque design, all that remains are the basic building layout, the western facade double archivolt and bows and starts from the original facade. Until 1892, it was the parish church for Infiesto.
The church was destroyed by fire in 1936, during the Civil War, in which the eighteenth-century altarpiece was also burned.
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.