Initial construction XVIIe siècle (≈ 1750)
Period of construction of the main mansion.
XVIIIe siècle
Addition of the chapel
Addition of the chapel XVIIIe siècle (≈ 1850)
Rectangular chapel built this century.
13 février 1992
Historical Monument
Historical Monument 13 février 1992 (≈ 1992)
Registration of facades and chapel.
Aujourd'hui
Aujourd'hui
Aujourd'hui Aujourd'hui (≈ 2025)
Position de référence.
Heritage classified
Facades and roofs of the housing body; Chapel of the castle (Box H 512): inscription by order of 13 February 1992
Key figures
Guéhéneuc de Boishue - Noble owner
Family owning the castle in the 17th-15th centuries.
Origin and history
The castle of Loziers, also known as the manor house of Lozier (or the Hozier), stands in the commune of Plumaugat, in the Côtes-d'Armor department in Brittany. Built in the 17th and 18th centuries, it consists of a body of rectangular houses flanked by two square pavilions and half-towers, organized around a courtyard accessible by a treed alley. A rectangular chapel, oriented north-south and dated from the eighteenth century, completes the architectural ensemble. The communes close the courtyard to the north, directly grafted into the mansion.
Originally, the castle belonged to the Geheneuc of Boishue, a noble Breton family who also owned the castle of Plumaugat, a fortress located 500 meters northeast of the village. The latter was originally owned by the Plumaugat family before passing to the Geheneuc. The mansion of Loziers, with its chapel and facades, was inscribed under the title of Historical Monuments by decree of 13 February 1992, thus protecting its most remarkable elements: the house body, its roofs and the chapel (cadastre H 512).
The site is part of a typical rural Breton landscape, where manor houses like Loziers played a central role in the local social and economic organization. These seigneurial residences, often accompanied by private chapels, reflected the power of noble families while serving as places of life, administration and sometimes worship for the surrounding populations. The presence of a treed alley and a closed courtyard also illustrates the importance attached to symmetry and order in the development of the aristocratic domains of the time.