I disagree with some of the answers: I answered Santiago de Compostela for the place with a prestigious University and the quiz says it is Salamanca. I think the University in Santiago is older and much more prestigious than Salamanca.
Also, Madrid
does have a Cathedral: la Almudena (very close to the Palacio Real). It's not as imposing as the one on Toledo or Zaragoza or Segovia, but it is a Cathedral.