Saint Jerome once owned by controversial collector Giulano Ruffini sent for technical tests

A painting of Saint Jerome attributed to the 16th-century artist Parmigianino is now being investigated, Sothebys New York has confirmed. A similar set of technical tests led the auction house to conclude that a Portrait of a Man attributed to Frans Hals, which it also sold in good faith, was a forgery, as our sister paper the Journal des Arts first reported in late September. 
The auction house sold the painting of Saint Jerome in January 2008 for more than $800,000 as a work from the cir