- Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Congresses (3)
- Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Homes and haunts--France--Paris--Congresses (2)
- Hegel, Georg Wilhelm Friedrich, 1770-1831--Views on Plato (1)
- Plato (1)
- Renaissance--Congresses (1)
- Turkey--Commerce--History--19th century--Congresses (1)
- Turkey--Economic conditions--Congresses (1)
- Turkey--History--Ottoman Empire, 1288-1918--Congresses (1)
- Turkey--Social conditions--Congresses (1)
- no value (1)