BRUSSELS.- Regarded today as one of the founders of the Spanish School of painting, El Greco has not, however, always enjoyed that lofty status. At the time of his death in Toledo in 1614, Europe was wildly enthusiastic about the then fashionable naturalism of the Caravaggesque style, poles apart from his own brilliant Mannerism. El Greco’s work soon went out of fashion and remained relatively neglected down the centuries – until 1908, when the art historian Manuel Bartolomé Cossío devoted a key monograph to him.