Count Guglielmo liked to spend most of his days writing, studying and receiving guests and friends in this room, which he had renovated in the 1960s. The wooden panelling cladding the walls in a sequence of secret compartments, revolving doors and shelves originally housed part of the extensive family library, consisting of more than 22,000 volumes, now deposited together with the Historical Archives at the nearby State Archives in Gorizia.
Inside the bookcase is a pair of Flemish panels from the early 16th century, depicting on one side two biblical episodes, King David receiving water from the wells of Bethlehem and Solomon and the Queen of Sheba, and on the other two figures of saints, Gertrude of Nivelles and Hadrian of Nicomedia. Mounted on a pivot that allows them to be turned and admired from both sides, they were originally the side panels of a portable altar that also featured a central panel depicting the Adoration of the Magi.
The stone fireplace, surmounted by a painting of the family coat of arms and decorated with a lion's head, comes from the original Coronini residence at Berbenno in the Bergamo area. First located in Cronberg (Moncorona or Kromberk) Castle, it survived the fire that destroyed the building during World War II and was recovered by Count Guglielmo before the property was then handed over to the Yugoslav authorities.
Some valuable paintings can be admired on the walls: a beautiful female portrait painted between the end of the 16th and the beginning of the 17th century and The Vision of St. Peter, an antique copy from a work by Domenico Fetti (1589-1624). The small Eros in the corner of the bookcase, the Woman turned on her back and the Landscape with Golden Rain are all that remains of a 16th-century painting of the Venetian school depicting the myth of Danae, which was purchased by Count Coronini in the 1920s.
Before entering the Dining Room, to the left, above a lavishly carved 16th-century chest, is a unique 18th-century baptismal ark from Cividale Cathedral.
