Spain blocks export of painting that could be a lost Caravaggio

Crowning with Thorns was due to be sold by auction in Madrid on Thursday with guide price of €1,500Before it was pulled from sale, lot 229, a small but luminous oil painting of the scourged Christ attributed to the circle of the 17th-century Spanish artist José de Ribera, had been due to go under the hammer in Madrid on Thursday with a guide price of €1,500 (£1,300).Closer inspection, however, has raised suspicions that the Crowning with Thorns may be the rather more valua