acropolis

linnavuori, linna A promontory (usually fortified with a citadel) forming the hub of many Grecian cities, and around which many were built for defensive purposes before and during the w:Classical Greece|classical period; compare (m).
1850: Karl Otfried Müller and John Leitch (translator), Ancient Art and Its Remains; or, A Manual of the Archæology of Art, http://books.google.co.uk/books?id=QcUDAAAAYAAJ&pg=PA146&dq=%22surround+their+cities,+not+merely+their+acropoleis%22&ei=7UGiSqjTEYvgyQSxo9mLCAv=onepage&q=%22surround%20their%20cities%2C%20not%20merely%20their%20acropoleis%22&f=false page 146:

The Etruscans, then, appear in general as an industrious people ( (lang)), of a bold and lofty spirit of enterprise, which was greatly favoured by their priestly aristocratic constitution. Massive walls, mostly of irregular blocks, surround their cities (not merely their acropoleis); the art of protecting the country from inundations by the construction of canals, and outlets from lakes, was very zealously practised by them.