Johann Koehler
Johann Koehler (1873, Mogilyov Governorate, Russian Empire – 1954, Duisburg, FRG) – Director of Riga city Russian Secondary School (1919 – 1921), teacher of history.
Photo: in the centre of the 2nd row Johann (Ivan) Koehler, first Director of Riga city Russian Gymnasium and teacher of history with his pupils. 1924.
Т. Фейгмане.Русские в довоенной Латвии (глава III)
Рижская городская русска гимназия (бывшая Ломоносовская) 1919-1935