One of the most frequently altered churches in the Loire Valley, St-Aignan was consecrated in 1509 in the form you see today. It possesses one of France's earliest vaulted hall crypts, complete with polychromed capitals. Scholars of pre-Romanesque art view the place with interest; its 10th- and 11th-century aesthetics are rare. Aboveground, the church's Renaissance-era choir and transept remain, but the Protestants burned the nave during the Wars of Religion.
In a wood-carved shrine are the remains of the church's patron saint Aignan, or Agnan(358-453). He was the Bishop of Orléans, who assisted Roman general Flavius Aetius in the defense of the city against Attila the Hun in 451.
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.