Arthur Friedländer, b: 1888 -

^{1914 - 1918 World War I}
^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}

^{1871 Franco - Prussian War}
^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}

^{1815 Battle of Waterloo, Napoleon defeat}
^{1830 French Revolution}
^{1837 Queen Victoria assumes throne}
^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}



	^{Hermann Friedländer}^{b.1850 d.1917 Berlin, Germany}

^{Arthur Friedländer}^b.1888 d.		^{Marcus Bielschowsky}^{b.1817 d.1904 Berlin, Germany}

	^{Paula Bielschowsky}^{b.1854 Wodzislaw Slaski, Poland d.1912 Berlin, Germany}	^{Rosalie Loewenthal}^{b.1821 d.1902 Berlin, Germany}





^{Grete Karsten}^b.1895 d.