MonopterosA monopteros (Ancient Greek: ὁ μονόπτερος, from the Polytonic: μόνος, ´only, single, alone´, and τὸ πτερόν, ´wing´) is a circular colonnade supporting a roof but without any walls. Unlike a tholos (in its wider sense as a circular building), it does not have walls making a cella or room inside. In Greek and especially Roman antiquity, the term could also be used for a tholos. In ancient times, monopteroi (Ancient Greek: οἱ μονόπτεροι) served among other things as a form of baldachin for a cult image. An example of this is the Monument of Lysicrates in Athens, albeit with the spaces between the columns being walled in, even in ancient times. The Temple of Rome and Augustus on the Athenian Acropolis is a monopteros from Roman times, with open spaces between the columns. Cyriacus of Ancona, a 15th-century traveller, handed down his[whose?] architrave inscription: Ad praefatae Palladis Templi vestibulum.[citation needed] beehive tomb Pavilion Temple