He exposed dozens of other fakes in public collections, including the Piranesi and the Brueghel.

FORBES: Eric Hebborn Wants To Teach You How To Forge Art. Got A Pen? [Book Excerpt #2]

The drawing was inspired by an engraving that Hebborn believed Piranesi had flubbed.

FORBES: Eric Hebborn Wants To Teach You How To Forge Art. Got A Pen? [Book Excerpt #2]

He drew convincingly as Andrea Mantegna and Nicolas Poussin, Giovanni Battista Piranesi and Peter Paul Rubens, Thomas Gainsborough and Jean-Baptiste-Camille Corot.

FORBES: The Case Of The Art Forger Who Restored Dead Painters' Careers [Book Excerpt]

The Piazza dei Cavalieri di Malta, designed by the Italian artist Piranesi in the 18th Century, is decked with enigmatic symbols, the overall effect being of a Piranesi engraving that has sprung to life.

BBC: Rome��s most mysterious places

The dungeons of the Castel Sant'Angelo, a papal fortress just near the Vatican, inspired the 18th Century Italian artist Giovanni Battista Piranesi to create his famous series of imaginary etchings of Roman prisons - I Carceri.

BBC: Magazine

Descriptively titled Part of a Large Magnificent Port Used by the Ancient Romans, the print seemed unusually cramped and illogical in perspective, Hebborn claimed, as if Piranesi had tried to fit his scene on too small a copper plate.

FORBES: Eric Hebborn Wants To Teach You How To Forge Art. Got A Pen? [Book Excerpt #2]