The Saint-Pierre Abbey in Airvault was initially a collegiate church of regular canons of Saint Augustine, founded around 990 by Audéarde, wife of Viscount Herbert I of Thouars. As the canons were lax in following the rules of the Order of Saint Augustine, the Bishop of Poitiers decided to send a monk from the Augustinian abbey of Lesterps in Limousin to reform it. Pierre de Fonte Salubri (of Saine Fontaine) was appointed the first abbot of Airvault in 1096 and died on August 7, 1110. He undertook the construction of the abbey church. According to the Chronicle of Saint-Maixent, the church was consecrated in 1100 but subsequently underwent modifications and additions.
After the creation of the diocese of Maillezais in 1317, transferred to La Rochelle in 1648, the abbey became dependent on it.
During the Revolution a road was pierced through the abbey separating the convent buildings of the abbey. Several buildings are still visible as the room called the 'vat', the 'prison' (fortified gate), underground rooms, the fourteenth-century chapel and especially the abbey house which has hosted since 1975 the municipal museum.
Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.