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 Alexander, 5th Prince of Thurn and Taxis received the Imperial Abbey of St. Emmeram and associated territories in Regensburg. Karl Alexander also received as the family head of the House of Thurn and Taxis, Prussian possessions in the Grand Duchy of Poland. In 1822/23, he bought from the Count Kinsky and others the Burg Richenburg in Bohemia. ! colspan="3" style="background: #bebebe; color: #000000" | Postal offices Karl Alexander, 5th Prince of Thurn and Taxis Karl Alexander, 5th Prince of Thurn and Taxis, full German name: "Karl Alexander Fürst von Thurn und Taxis" (22 February 1770, Imperial City of Regensburg, Holy Roman Empire, 15 July 1827, Schloss Taxis,