id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-9531 Acropolis of Athens - Wikipedia .html text/html 6200 889 67 During 437 BC, Mnesicles started building the Propylaea, a monumental gate at the western end of the Acropolis with Doric columns of Pentelic marble, built partly upon the old propylaea of Peisistratos.[21] These colonnades were almost finished during 432 BC and had two wings, the northern one decorated with paintings by Polygnotus.[22] About the same time, south of the Propylaea, building started on the small Ionic Temple of Athena Nike in Pentelic marble with tetrastyle porches, preserving the essentials of Greek temple design. During the Byzantine period, the Parthenon was used as a church, dedicated to the Virgin Mary.[36] During the Latin Duchy of Athens, the Acropolis functioned as the city's administrative center, with the Parthenon as its cathedral, and the Propylaea as part of the Ducal Palace.[37] A large tower was added, the "Frankopyrgos", demolished during the 19th century.[38] ./cache/en-wikipedia-org-9531.html ./txt/en-wikipedia-org-9531.txt