German archivist and historian
Ludwig Keller (28 May 1849, in Fritzlar – 9 March 1915, in Berlin) was a German archivist and historian, known for his writings on the Reformation, Anabaptism and Freemasonry.
From 1868 he studied at the universities of Leipzig and Marburg, and in 1874 became an archivist at the state archives in Marburg. During his studies, he was a member of the confraternity " Marburger Burschenschaft Germania". Shortly afterwards, he relocated to the state archives in Münster, where from 1881 to 1895 he served as director. From 1895 onward, he worked at the classified state archives in Berlin.
In 1897 he was admitted to the Masonic lodge "Zur Eintracht und Standhaftigkeit" (For unity and steadfastness) in Kassel. In 1899, he joined the "Urania zur Unsterblichkeit" (Urania for Immortality) lodge in Berlin. He was also Grand Orator of the Royal Grand Lodge of York for Friendship ("Großen Landesloge Royale York zur Freundschaft"). Within this Grand Lodge he held the position of Supreme Master ("Oberster Meiste").
He was the founder and chairman of the "Comenius-Gesellschaft zur Pflege der Wissenschaft und der Volksbildung" (Comenius Society for the Advancement of Science and Popular Education). He was the author of numerous biographies in the "Allgemeine Deutsche Biographie".
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