John Castagno is a multimedia artist and sculptor. He has been an art researcher for the past forty years and also lectures on art and on art as an investment. Mr. Castagno's recent books include Abstract Artists: Signatures and Monograms, An International Directory, From 1900 (2007), American Artists II: Signatures and Monograms, From 1800 (2007), Artists' Monograms and Indiscernible Signatures II: An International Directory, From 1900 (2007), and European Artists II: Signatures and Monograms, From 1800 (2007).

Art researchers have always had difficulty identifying these initials and marks, but Castagno has made their jobs much easier.

John Castagno is a multimedia artist and sculptor. He has been an art researcher for the past forty years and also lectures on art and on art as an investment. Mr. Castagno's recent books include Abstract Artists: Signatures and Monograms, An International Directory, From 1900 (2007), American Artists II: Signatures and Monograms, From 1800 (2007), Artists' Monograms and Indiscernible Signatures II: An International Directory, From 1900 (2007), and European Artists II: Signatures and Monograms, From 1800 (2007).

Art researchers have always had difficulty identifying these initials and marks, but Castagno has made their jobs much easier.

John Castagno is a multimedia artist and sculptor. He has been an art researcher for the past forty years and also lectures on art and on art as an investment. Mr. Castagno's recent books include Abstract Artists: Signatures and Monograms, An International Directory, From 1900 (2007), American Artists II: Signatures and Monograms, From 1800 (2007), Artists' Monograms and Indiscernible Signatures II: An International Directory, From 1900 (2007), and European Artists II: Signatures and Monograms, From 1800 (2007).

Art researchers have always had difficulty identifying these initials and marks, but Castagno has made their jobs much easier.