Karl Friedrich May (February 25, 1842 March 30, 1912) was a German writer, noted mainly for books set in the American Old West, (best known for the characters of Winnetou and Old Shatterhand) and similar books set in the Orient and Middle East. In addition, he wrote stories set in his native Germany, in China and in South America. May also wrote poetry and a play, as well as composing music; he was proficient with several musical instruments. May's musical version of "Ave Maria" became very well known. May was born into a family of poor weavers in Ernstthal, Schönburgische Rezessherrschaften, Kingdom of Saxony, the fifth child out of 14. According to his autobiography, he suffered from visual impairment and rickets shortly after birth, due to lack of vitamins A and D. He regained his eyesight after treatment at the age of four or five.