Simplify the following text for a Grade 13 native English-speaking person.
Original: In ancient Greece , the Acropolis ( literally : `` peak of the city '' ) , placed on a commanding eminence , was important in the life of the people , serving as a refuge and stronghold in peril and containing military and food supplies , the shrine of the god and a royal palace .
Simplified: In Ancient Greece , the Acropolis was important in the life of the people , serving as a refuge and stronghold in peril and containing military and food supplies , the shrine of the god and a royal palace .