Rabat, February 16 - A Guercino painting that was stolen in 2014 from San Vincenzo church in Modena has been found in Casablanca, according to website Le Site.info on Thursday. It said the 1639 oil painting, 'Madonna with Saint John the Evangelist and Gregory Thaumaturgus', had been offered for sale by three fences to a Moroccan businessman and art collector who recognized the painting's value and alerted authorities. Casablanca police arrested the three men while they were attempting to sell the painting. The large (about 293 x 185 cms) painting was one of Guercino's most renowned, admired and photographed works, and its value is impossible to estimate. Le Site.info said the painting was offered for 10 million dirhams (equivalent to about 940,000 euros) and one of the men who was trying to sell it had lived for an extended period in Italy.