Where is the oldest CATHEDRAL in Spain
 

Dear Sirs,

Because I'm working on the research of Angels, and I prepare to go to Spain in October for this subject. But now I have a question is:
"Do you know where is the oldest cathedral in Spain? "

I will be very appreciate for your help.

Sincerely yours,
Aida Yuan

I suggest you obtain the Michelin guide for Spain. Almost certainly it will enable you to identify the oldest cathedral.