The De Brandis Villa is found along the main route of the administrative centre, protected by a surrounding wall with beautiful wrought iron gates. It was donated as a will bequest to the municipality of San Giovanni al Natisone in 1984 by the countess Caterina de Brandis, the last descendent of the noble house.
The construction of the villa began in 1718 and was completed in 1724, and it had an additional wing added at the end of the nineteenth century. Preserved in its interior are Grotesque Frescos which decorate the staircase area, as well as landscapes scenes in frames painted in trompe-l'oeil which are attributed to Antonio Picco (1828-1897) and which are now re-included in the section of the building which is designated as the headquarters of the library.
The De Bradis Villa also preserves some important artistic collections: the Quadreria (painting gallery), a considerable number of wooden pieces of furniture, original and interesting artefacts (from the sixteenth to nineteenth centuries), as well as a collection of prints, the family library, the photographic archive and the papers of the noble archive.
The collection of paintings, notwithstanding the numerous thefts, represents one of the few collection examples in the Friulian area. There are numerous canvases dating back to the eighteenth century, amongst which some are by artists from the Venetian school of Pietro Longhi. The villa is furthermore completed by splendid a green furnishing that Count Niccolò De Brandis, due to his naturalistic sensitivity, ordered to be repaired between 1885 and 1895 by the architect Giuseppe Rho of Milan.