An introduction to the principle of relative expression (Jerusalem Surrounded by Mountains) 1990

An introduction to the principle of relative expression
(Jerusalem Surrounded by Mountains) 1990

Please note: The form of the copper water pipes ( ref., the combination of the 25 copper water pipes on the floor) is based on the outline of the old city walls of Jerusalem. 
The length of the walls is 4.5 - 5 Km.