I remeber it being built behind the Canton Stand in the mid to late sixties.
I was too young to go in in those days except a couple of times when they would show screenings of old matches.
None of yoir 65 inch TV screens in those daysbjut a projector and portable screen
I remember seeing Real Madrid V Eintracht Frankfurt there. It isna shame tghe club let it run down to an extent where it had to be demolished. When was that?