Beliefs and traditions
Inside the Cathedral there is an image of a saint or self-portrait of Master Mateo, the architect of the cathedral's main facade. According to tradition, if you knock your head three times against the saint, you acquire wisdom. Well I knocked but I don't remember what I asked for or if the wisdom was acquired .
In spanish the saint is called : O Santo dos croques.

Chapel of Santa Catalina (Cathedral, Santiago)
Cathedral (Santiago de Compostela., Spain)
Cathedral (Santiago de Compostela., Spain)
Praza de Cervantes