El Greco El Greco officially complained about this event. A few months later, on 18 September 1572, he paid his dues to the Guild of Saint Luke in Rome as a miniature painter. At the end of that year, El Greco opened his own workshop and hired as assistants the painters Lattanzio Bonastri de Lucignano and Francisco Preboste. In 1577, El Greco migrated to Madrid, then to Toledo, where he produced his mature works. At the time, Toledo was the religious capital of Spain and a populous city with "an illustrious past, a prosperous present and an uncertain future". In Rome, El
Art of El Greco "madness". The critic Zacharie Astruc and the scholar Paul Lefort helped to promote a widespread revival of interest in his painting. In the 1890s, Spanish painters then living in Paris adopted him as their guide and mentor. In 1908, art historian Manuel Bartolomé Cossío, who regarded El Greco's style as a response to Spanish mystics, published the first comprehensive catalogue of El Greco's works. In this book, El Greco is described as the founder of the Spanish School and as the conveyor of the Spanish soul. Julius Meier-Graefe, a scholar of French Impressionism, travelled in Spain in 1908 and wrote