Franz Beckenbauer, considered the greatest German football legend, died on Sunday at the age of 78, his family told dpa on Monday. Known as “Der Kaiser”, Beckenbauer won the World Cup as a player and coach and brought the 2006 World Cup to Germany. “It is with deep sadness that we inform you that my husband and our father Franz Beckenbauer passed away peacefully yesterday, Sunday, surrounded by his family,” the family announced. “We ask that you mourn in silence and refrain from asking any questions.” Beckenbauer joined Bayern as a junior player and quickly became a key player for the Munich c…