Acropolis

An acropolis (Ancient Greek: ἀκρόπολις, akropolis; from akros (άκρος) or akron (άκρον), "highest, topmost, outermost" and polis (πόλις), "city"; plural in English: acropoles, acropoleis or acropolises) was in ancient Greece a settlement, especially a citadel, built upon an area of elevated ground—frequently a hill with precipitous sides, chosen for purposes of defense. Acropoleis became the nuclei of large cities of classical antiquity, such as ancient Athens, and for this reason they are sometimes prominent landmarks in modern cities with ancient pasts, such as modern Athens.