| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Angels from the Vatican: The Invisible Made Visible | 978-O-81O9-6355-9 (O-81O9-6355-8) | 1998 | Paolo Liverani · Maurizio Sannibale · Basil Cole · Arnold Nesselrath · Art Services International |
Christian Robert · R. C. · R Christian · Robert C. · Robert Christian Bachmann · Robert Christian Puth · Robert Christian Reisacher · Robert Christian van Ooyen