Rudolf Kallas
Rudolf Gottfried Kallas (22 May 1851 – 22 April 1913) was an Estonian clergyman and pedagog.
1871-1875 he was a primary school pedagog in Tartu. In 1883 he graduated from Tartu University. After graduating he had been a pastor in Valga, Rõuge and St. Petersburg.
Until 1881 he was a member of Estonian Literary Society.
His "System der Gedächtnislehre" was the first scientific publication about psychology which was written by an Estonian.