The earliest recorded castle of Château de Challain-la-Potherie dates all the way back to the medieval age in 1050. The original castle was probably part of the ‘Les Marches de Bretagne’ a series of fortresses that acted as a defensive line that protected the people of the ancient region of France known as Brittany. That chateau, and many others that followed it were destroyed in the wars, and conflicts that wracked the area in the centuries that followed.
The current Château de Challain-la-Potherie was built from 1847 to 1854 in the neo-Gothic style, which was fashionable among the French aristocracy at the time. Its architect, René Hodé, designed many other châteaux in the same style in Anjou, but Challain remains the most imposing.
The 19th-century castle was commissioned by Louise-Ida de La Potherie, the last of her name, and her husband, the Count of La Rochefoucauld-Bayers. The choice of the neo-Gothic style was a means for them to restore the family's glory after the French Revolution. It was also a choice motivated by the tastes of the time, as neo-Gothic was in vogue among the Angevin aristocracy. René Hodé specifically adopted the troubadour style, which applied a neo-medieval decoration to a functional structure. The internal structure of the castle and its general layout followed the neoclassical architectural rules developed in the 18th century.
Despite its grandeur and significant place in the history of Angevin architecture, it suffered some degradation after the death of its patrons. It had numerous successive owners during the 20th century and served as a vacation colony center for about twenty years. Finally, in 2002, it was transformed into a luxury guesthouse.
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.