Propylon

In ancient Greek architecture, a propylon (/ˈprɒpɪlɒn/ or /ˈprɒupɪlɒn/; Ancient Greek πρόπυλον) is a monumental gateway, also referred to as a propylaeum (/prɒpɪˈliːəm/, a Latinized form of προπύλαιον), and often given in the plural as propyla or propylaea. It serves as a partition, separating the secular and religious parts of a city. The prototypical Greek example is the propylaea that served as the entrance to the Acropolis of Athens, which inspired Greek Revival architecture such as the Brandenburg Gate of Berlin and the Propylaea in Munich, which both evoke the central portion.