Clas Theodor Odhner

Clas Jonas Theodor Odhner (17 June 1836 in Alingsås, Sweden – 11 June 1904 in Stockholm, Sweden) was a Swedish historian, and director of the Swedish National Archives (Riksarkivet).

Odhner was the son of a clergyman, and his mother was a sister of Nils Ericson and John Ericsson.

Odhner went to school in Skara and matriculated at Uppsala University in 1851, completing the degree of filosofie magister and becoming a docent of History in 1860.

He taught at Lund University from 1865, as professor of history from 1870 until 1887, when he was appointed riksarkivarie, director of the National Archives, a position in which he remained until 1901.

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