Baedeker of pre-1872 guides continued to be printed where all Baedeker guides had been produced before—the G.D. Baedeker printing works in Essen. Fritz ventured into territory none of his predecessors had covered before, inside and outside Europe e.g. Russia, Sweden, Norway, Palestine, Syria, Egypt, Greece, the Mediterranean, USA, Canada, India and South East Asia. Plans to publish guides on China and Japan had to be abandoned when war broke out in 1914. At home, the list of guides on German regions and cities continued to grow. His was the golden age of Baedeker travel guides. Fritz also had the good fortune
Karl Friedrich Köppen Karl Friedrich Köppen Karl Friedrich Köppen (26 April 1808 – 26 April 1863) was a German teacher and political journalist. He was one of the Young Hegelians. Köppen was from a born in a pastor's family in Altmark. He studied theology at the University of Berlin from 1827 to 1831, but later turned to religio-critical Hegelianism. After his studies and military service in 1833, he taught at the secondary school Dorotheenstädtischer. In 1837, he met Karl Marx, with whom he developed a close friendship. In 1840 he became one of the most active associates of Arnold Ruge and published Hallischen