fine, fair hair of which he was rather vain". His early biographer Niemetschek wrote, "there was nothing special about [his] physique.... He was small and his countenance, except for his large intense eyes, gave no signs of his genius." His facial complexion was pitted, a reminder of his childhood case of smallpox. Of his voice, his wife later wrote that it "was a tenor, rather soft in speaking and delicate in singing, but when anything excited him, or it became necessary to exert it, it was both powerful and energetic." He loved elegant clothing. Kelly remembered him at a rehearsal: was on the stage with his crimson pelisse and gold-laced cocked hat, giving the time of the music to the orchestra." Based on pictures that researchers were able to find of Mozart, he seemed to wear a white wig for most of his formal occasions—researchers of the Salzburg Mozarteum declared that only one of his fourteen portraits they had found showed him without his wig. Mozart usually worked long and hard, finishing compositions at a tremendous pace as deadlines approached. He often made sketches and drafts; unlike Beethoven's, these are mostly not preserved, as his wife sought to destroy them after his death. Mozart lived at the center of the Viennese musical world, and knew a significant number and variety of people: fellow musicians, theatrical performers, fellow Salzburgers, and aristocrats, including some acquaintance with Emperor Joseph II. Solomon considers his three closest friends to have been Gottfried von Jacquin, Count August Hatzfeld, and Sigmund Barisani; others included his elder colleague Joseph Haydn, singers Franz Xaver Gerl and Benedikt Schack, and the horn player Joseph Leutgeb. Leutgeb and Mozart carried on a curious kind of friendly mockery, often with Leutgeb as the butt of Mozart's practical jokes. He enjoyed billiards, dancing, and kept pets, including a canary, a starling, a dog, and a horse for recreational riding. He had a startling fondness for scatological humour, which is preserved in his surviving letters, notably those written to his cousin Maria Anna Thekla Mozart around 1777–1778, and in his correspondence with his sister and parents. Mozart also wrote scatological music, a series of canons that he sang with his friends. Mozart was raised a Catholic and remained a devout member of the Church throughout his life. Works, musical style, and innovations Style Mozart's music, like Haydn's, stands as an archetype of the Classical