Germany's tallest man, Konstantin Klein, whose 223-centimetre height brought him success as an entertainer, has died at the age of 51, police said Saturday. A newspaper, the Offenbach Post, quoted his brother saying that he had found Klein dead on Thursday of heart failure in his home in Offenbach. Police did not disclose a cause of death., dpa reported.Klein, whose surname means "small" in German, made promotional appearances and worked as a circus clown till mounting health problems ended his career. Klaus Fay of the German tall people's club KLM said, "Konstantin Klein was the biggest among us by a long shot."