Castle of Arginy, Medieval castle in Charentay, France.

The Castle of Arginy is a fortress with four round corner towers arranged in a rectangular layout, surrounded by two concentric walls and deep defensive moats. The structure displays the key features of medieval military architecture with its multiple defensive layers.

The castle was built in the mid-14th century, probably after the Beaujeu family sold the estate to Guillaume du Vernet, a bourgeois from Montbrison. In 1374 Guichard de Verneys paid homage for it, and the du Vernet family held it until 1455. It was rebuilt in the 15th century and altered in the 16th century.

The castle's name comes from Arginus, a lieutenant of Julius Caesar who, according to tradition, built an oppidum on the site. The Templar link rests on a legend: Jacques de Molay is said to have asked his nephew Guichard de Beaujeu to hide the order's treasure at Arginy. In the 20th century esotericist Jacques Breyer lived here and founded the "Arginy Renaissance" neo-Templar movement.

The property remains privately owned and can be viewed from outside, with the facades and roofs protected as a historical monument. Visitors should confirm in advance whether interior access is available.

The master tower, called the Tower of the Eight Beatitudes, is cylindrical outside but octagonal inside, built of brick in the 13th century. It stands in the last corner of the inner enclosure, of which only one wing and two round turrets remain.