Colonna is a comune in the Metropolitan City of Rome in the Italian region Latium, located about 20 kilometres southeast of Rome, on the Alban Hills. With a population of some 4,300, it is the smallest of the Castelli Romani.
Wikipedia https://en.wikipedia.org/wiki/Colonna,_Lazio
Coordinates 41°50'1.384" N 12°45'11.462" E
