Today's lesson focused on Acropolis. Mercer learned details about why this city became known as the home for the Gods. He read that Acropolis was located on the highest ground and contained the chief municipal and religious building. He learned that because an acropolis had to be a citadel, religiously, the hill where it was located was imbued with natural mysteries—caves, springs, copses, and glens—that denoted the presence of the gods. Mercer was on task.