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 August Senff with scientist Wilhelm Struve before going on to found the Nikolayev Astronomical Observatory in 1827. Karl August Senff Karl August Senff (12 March 1770 in Kreypau, Prussia – 2 January 1838 in Dorpat, Governorate of Livonia, Russian Empire) was a Baltic German painter, engraver and teacher. He is best known for his etchings of famous German and Estonian military figures in service to the Imperial Russian Army. He served as professor of drawing at the University of Dorpat (now University of Tartu) from its reopening in 1802 until his death in 1838 where he trained some of Estonia's most celebrated