The building of Lescar Cathedral was begun in 1120 by Bishop Guy de Lons, and was sacked by the Protestants during the reign of Jeanne III of Navarre. It was restored in the 17th and 18th centuries. The apse, housing a pavement mosaic from the 12th century with hunting scenes, is in Romanesque style. In the interior, columns have capitals depicting histories of the life of Daniel, of the birth of Christ and the Sacrifice of Isaac.
From the end of the 15th century the cathedral was used as the burial place of the royal family of Navarre. Francis Phoebus was buried here in 1483, followed by Catherine of Navarre, her consort Jean d'Albret and several of their children, among them Henry II of Navarreand his wife Marguerite of Angoulême, grandparents of King Henry IV of France.
Of the funerary monuments ordered by Henry II, subjected to iconoclastic damage by Protestants and to the collapse of the sanctuary vault in 1599, nothing remains. Archaeological excavations in 1928-1929 were successful however in rediscovering the royal crypt and the remains of its occupants.
References:The Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.