sentences:  It was necessary to give them something splendid, and this was likely a performance of the colossal 40 and 60 voice mass, along with a copy for their archives.Leaving Florence in December 1566, he visited Mantua, and then made the difficult winter trek over the Brenner Pass, visiting Vienna, Brno, Munich, and Paris.In June 1567 he made his way to London with the specific purpose of meeting "the virtuosos in the profession of music that were there" (as he wrote in a letter to Francesco I de' Medici, dated 18 May 1567).