The Donjon Lacataye is the keep of a 14th-century castle, constructed by order of Gaston Phébus in the commune of Mont-de-Marsan.
La Cataye consists of two joined Romanesque houses, which one sees perfectly while entering the current museum whose central internal wall includes Romanesque windows, a sign that one of the two houses was built before the second. These houses belonged to the Viscount's family and were more or less abandoned starting from the 15th century, when the Viscounts moved away from their town of origin. During the 16th century, their upper parts were modified and they were equipped with crenellations.
In 1860, Antoine Lacaze, mayor and owner of the keep, gave it to the town to house troops. It later became the departmental barracks until 1875, when the soldiers moved to the Bosquet barracks in the town. The keep preserved the name Caserne Lacaze (Lacaze Barracks) for nearly a century, in spite of a succession of civil uses: boarding school for young girls, gymnastics centre, municipal workshop.
In 1968, mayor Charles Lamarque-Cando inaugurated in the keep a museum of modern figurative sculpture (the Musée de Mont-de-Marsan), dedicated to two local artists, Charles Despiau and Robert Wlérick.
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.