Congresses

1873	I	Paris		1874	II	London
1876	III	S. Petersburg		1878	IV	Florence
1881	V	Berlin		1883	VI	Leiden
1886	VII	Vienna		1889	VIII	Stockholm/Christiania
1891	IX	London		1892	IX	London
1892	X	Lisbon		1894	X	Geneva
1897	XI	Paris		1899	XII	Rome
1902	XIII	Hamburg		1905	XIV	Algiers
1908	XV	Copenhagen		1912	XVI	Athens
1928	XVII	Oxford		1931	XVIII	Leiden
1935	XIX	Rome		1938	XX	Brussels
1948	XXI	Paris		1951	XXII	Istanbul
1954	XXIII	Cambridge		1957	XXIV	Munich
1960	XXV	Moscow		1964	XXVI	New Dheli
1967	XXVII	Ann Arbor		1971	XXVIII	Canberra
1973	XXIX	Paris