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
Maximilian Karl, 6th Prince of Thurn and Taxis Maximilian Karl, 6th Prince of Thurn and Taxis Maximilian Karl, 6th Prince of Thurn and Taxis, full German name: "Maximilian Karl Fürst von Thurn und Taxis" (3 November 1802, Regensburg, Electorate of Bavaria – 10 November 1871, Regensburg, Kingdom of Bavaria) was the sixth Prince of Thurn and Taxis, head of the Thurn-und-Taxis-Post, and Head of the Princely House of Thurn and Taxis from 15 July 1827 until his death on 10 November 1871. Maximilian Karl was the fourth child of Karl Alexander, 5th Prince of Thurn and Taxis and his wife Duchess Therese of Mecklenburg-Strelitz, sister of Queen Louise