Piona Abbey is a religious complex on the bank of Lake Como. The abbey is set at the top of a small peninsula, the Olgiasca, which points into the lake, creating an inlet.
The original church of Saint Justina was founded in the 7th century; the ruins of an apse behind the current church of San Nicola belong to this original edifice. A new church was added some centuries later, though before 1138, as testified by an inscription reporting its reconsecration in that date. which was followed - some centuries afterwards - by a priory, with its monastery complex, part of the political-religious network which was led by Cluny and its reform movement.
The location, although away from the main town, was on a military route of critical importance in the wars of the times.
The abbey was built in Lombard Gothic style, with French influences. The church has a single nave, and the edifice dates mostly from the 12th century reconstruction. The bell tower dates from the 18th century. A previous one, with an octagonal plan, was located on the other side of the church.
The apse has internally some depleted frescoes, dating from the 12th-13th centuries, with Apostles of Byzantine style. The cloister has an irregularly quadrangular plan, and has round arches supported by columns with different type capitals. The northern wall of the portico has a fresco with a symbolic calendar, depicting the months and the different works associated to them.
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.