Simplify the following text for a Grade 11 native English-speaking person.
Original: All through Spanish America , the plaza mayor of each center of administration held three closely related institutions : the cathedral , the cabildo or administrative center , which might be incorporated in a wing of a governor 's palace , and the audiencia or law court .
Simplified: In Spanish America , the plaza mayor of each city had three things : the cathedral , the cabildo or administrative center , and the audiencia or law court .