It is a cathedral but it is the smallest one that I have been to. Some churches are much larger than this, for example St Walburges church which I have also posted. Cathedral comes form the word cathedra which in greek means seat. Basically the cathedral is where the bishop of the area sites, or resides. Most cathedrals as very large to denote the status of the bishop, but not all of them, likewise some churches are huge. Glasgow has two cathedrals, this is the Roman Catholic one. The Glasgow Anglican cathedral is quite huge in comparison.
I see, but it's not a matter of size (I actually can't tell how large it is by just looking at your picture anyway.. I also don't mind being given such details since I'm into churches myself). What I was, badly, trying to say is that this cathedral seems somehow empty looking so new and bright, which I know is something rather meaningless to say.. I just can't properly put it into words I guess XD Have you ever seen either Milan cathedral or Strasbourg cathedral?
Ah I see! Well the cathedral had just recently finished having major renovations to it, so that is why it looks brand new, shiny and bright, not like an old historic place.
Another cathedral that I visited recently had renovations just finished and that was Wakefield Cathedral which I have posted here. The stonework and decorations in that place were pristine clean as well.