Built on the site of an Celtic oppidum, the castle of Pons was an important medieval stronghold due to its location as a hub of roads including those for the pilgrims of Saint James. It belonged to the lord of Aulnay, Charente-Maritime, to the dukes of Aquitaine, then to the lords of Pons. Razed in 1179 by the Duke of Aquitaine Richard Lionheart following a revolt of his vassal, the castle was rebuilt in 1187 by Geoffroy III de Pons with the addition of the imposing quadrangular Keep of Pons, partially over of the foundations of the original, smaller keep and partially over new foundations. Based on the chapel facade, it is believed that the chapel was also rebuilt during this period.
The castle was again destroyed in 1622 (with the exception of the keep and some defensive elements) by the armies of Louis XIII following the siege of 1621. A few years later, Marshal Caesar Phoebus d'Albret had the current main building erected. Despite its cold appearance, several rooms within the Keep have comfortable interior with wooden ceilings and mounted canvas decorated with allegorical figures. The base of the ramparts has been partially preserved, and forms a walk from which one can enjoy a panoramic view of the Seugne valley. Caesar Phoebus d'Albret, Sire de Pons, ordered the construction of the monumental staircase which connects the upper city to the lower city.
The buildings and vestiges of the medieval castle were bought in 1806 by the municipality. Only the Castral Chapel and the Saint-Gilles porch, the Keep and the ramparts on the cliffs are the remains of the medieval fortress. The municipality set up the esplanade in the public garden and repurposed the main building as the town hall.
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.