Guttenbrunn (Ludwig) Six autograph letters (total of 17 pp.) signed ('L. Guttenbrunn' or 'Guttenbrunn'), in Italian, addressed to Venanzio de Pagave, Milanese art collector and secretary of Maria Theresa of Austria's government in Lombardy. Guttenbrunn writes from Naples that he really liked the Royal Chapel of the Treasure of St. Januarius with the painted decoration by Domenichino and says he has been commissioned by the Queen the portraits of prince and the Infanta (6 April 1782); in another letter he says he has made three copies after Raphael, Van Dyck  and Titian paintings in the Pitti Gallery (6 January 1784); the following  year he writes about his experiments with the 'encaustic' painting technique (3 April 1785); he also mentions various restorations he carried out on the works of Italian masters, age toning, some splitting along main folds, 4to, Naples and Florence, 1782-1785 (6)