St Mary's Catholic Cathedral / Edinburgh

There are two cathedrals in Edinburgh.
One of them is St Mary's Catholic Cathedral.

Interior is not so luxurious.
It seems big space bigger than I expected as the appearance of the cathedral. 

Organ is set above the entrance.
It was the first time for me to see organ at such a place.
Did they have any requirements to place chairs as many as they could.

The chair looks typical style, brief one.