Cologne
Opened 1860
ca.1958
1960
1961
1962
1964
1966
1968
1971
1975
1980
1985
1988
1990
1992
1993
1995
1998
#2005 (1st ed.)
#1971 (1st ed.)
#1974 (2nd ed.)
#1984 (3rd ed.)
#1989 (4th ed.)
ca.2004