I don't know how much it matters to
@MickMac and pilgrims in general whether the Cathedral is Late Romanesque, Gothic or Baroque, or a mixture of all three. There's a word for the kind of remodelling that took place all over Europe and was quite popular:
Baroquisation. I've never seen the word in English but it's on the net. Probably an attempt to translate it from German or French where the noun and the verb do exist:
baroquiser and
barockisieren.
For the Cathedral of Santiago, the most striking elements that are witness of this change are the facade of the Obradoiro Square and the main altar with all its gold and baby angels and teen angels - a popular motif in Baroque art.
Now that I think about it: I think I felt that I had arrived, that it was done, when we walked through the gate and saw the Obradoiro square for the first time. I never thought about this though. Like
@MickMac, I am "not unreligious". I go inside a church for two reasons: either to see what it looks like or because I feel it's time once in a while to go and to participate and to listen to the sermon. And sometimes just because I need to rest my feet and be in the cool air instead of the heat outside. FWIW, at the time, the Cathedral was undergoing major restoration work and mass was held elsewhere.