I am a student in Art History at the Katholieke Universiteit Leuven (Belgium) and am writing my thesis on a late 18th century house built in neo-palladian style. The columns of the central round salon (salon à l'italienne) have capitals (see attachment) with on boths side two griffons, on each side of these a corn of abundance between those two corns, in the middle of the capital a caduceus. This salon is dedicated to Apollo and the muses. Is there anybody who eventually met such capital (books, etchings etc..)?

Thank you very much for your help. Annemie