I want to know the answer to the following question:
Which church has had a large influence over Galicia since the Middle Ages?
All the background I'm provided with is that "Since the Middle Ages, the Galician Catholic Church has been organized into five ecclesiastical dioceses (Lugo, Ourense, Santiago de Compostela, Mondoñedo-Ferrol and Tui-Vigo).". Is that enough to answer the question?