Answer:
Monasteries
Step-by-step explanation:
Monasteries are place where nuns and priests are trained through a set of already laid out educational system. It is mostly found in areas where there is high religious practice. For the students, hoping to learn from distinguished scholars and receive an education, they can only do that in a town with great monasteries.
This is because, libraries would also be found inside them unlike the Mosques and Churches which are strictly for worship.