The Collapsable Cathedral

The new Cathedral had been designed rather like a concertina so that it's Bishop could count how many people were waiting outside and with a turn of a dial expand or contract the cathedral's vaulted ceiling and walls accordingly. 

During periods of great national crisis (war, famine and disease) the dial was turned up as far as it would go and the Cathedral took up an entire block but most of the time the house of God with it's gargoyles, flying buttresses and holy relics was folded out of the way between Pound land and Tesco Metro.