Blois Cathedral

The church of St. Nicholas-St. Laumer is a Romanesque church that was originally the abbey church of a monastery built in the 11th century. It is named after the founder of the abbey, Saint Laumer. Its construction began in the 11th century. The choir, transept and the first bay of the nave were built between 1138 and 1186. The church was completed in the early 13th century. The church was an important place of pilgrimage in the Middle Ages. It houses several relics: Saint Lubin, Saint Laumer, Saint Mary the Egyptian and a fragment of the cross of Christ.

The church of St Saturnin was built between the 10th and 11th centuries as a modest place of worship. It was not until the 15th and 16th centuries that it became an important place of worship, when the church acquired a miraculous statue of the Virgin, making it an important stop on the Way of St. James. At the beginning of the 16th century, Queen Anne of Brittany undertook reconstruction work on the church, but this was interrupted when she died in 1514. During the Wars of Religion, Protestants set fire to the building's roof structure in 1568. A reconstruction project at the beginning of the 16th century was set up and completely changed the style of the church with the creation of groin vaults between 1570 and 1578.

The Basilica of Our Lady of the Trinity was built between 1932 and 1939 by the architects Charles-Henri Besnard and Paul Rouvière. Due to the Occupation, the work could only be resumed in 1946 with a third and final architect, Yves-Marie Froidevaux, who devoted himself to completing the interior decoration. The Basilica of Notre-Dame-de-la-Trinité is considered to be a major building of sacred art in the inter-war period.