Notre-Dame-des-Marais in La Ferté-Bernard is a jewel of the flamboyant Gothic style, built on drained marshes between the 14th and 17th centruries. Remarkable as much by its Gothic and Renaissance architecture as by its stained glass windows (late 15th, 16th and 19th century), it also has a 'swallow's nest' organ (1536) and a 15th century alabaster treasure.
Church oriented with a Latin cross plan and Gothic style. Although the western gable façade is very sober, the rest of the exterior decoration of the building is in the flamboyant Gothic style. Inside, the church is bright and the filling of its stained-glass windows reveals skilful late Gothic forms.
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.