Baedeker to have three of his four sons − Hans, Ernst and Dietrich − beside him in the firm, as editors and writers. Karl Baedeker III, the fourth son, entered academia and rose to become a professor of physics at the University of Jena. He was killed in action at the Battle of Liège in August 1914. It was his son Karl Friedrich who revived Verlag Karl Baedeker after the Second World War. During his reign, which lasted over 50 years, Fritz produced 73 new "Baedekers", as they came to be known universally. The Baedeker travel guides became so popular that
Karl Albrecht Jr. and they have no children. Karl Albrecht Jr. Karl Albrecht Jr. (born 1948) is a German billionaire, and the son of Karl Albrecht, who founded the discount supermarket chain Aldi with his brother Theo. Albrecht worked for Aldi Süd in various roles until his resignation due to a cancer diagnosis (from which he subsequently recovered). He and his sister Beate Heister control the family trust, the Siepmann Stiftung (named for their mother), which, in turn, controls Aldi Süd, the source of their joint fortune. Together with Heister, he has a net worth of US$25 billion, as of December 2018. He