古ロ is read as ころ (koro) and means ancient Rome.
ころ
koro
ふるぼん
secondhand book
こだい
ancient times
こきん
ancient and modern times
ふるい
of the distant past
こぶんしょ
pre-Meiji era document addressed to someone in particular
こぶつ
antique
こぼく
old tree
こふう
old-fashioned
こご
old language
こぶん
ancient Chinese character (pre-Qin period)
こしょ
いにしえ
antiquity