free entrance - closed today
11.6 - 16.6 1988
16.4 - 29.5 1988
29.8 - 11.10 1987
18.6 1987
30.8 - 12.10 1986
14.6 - 17.8 1986
1.2 - 23.2 1986
20.12 1985 - 26.1 1986
30.11 - 8.12 1985
