古代：antiquity, ancient times

古城：ancient city, early city

古瓷：old china

古词：archaism

古代文明：ancient civilization

古代社会：ancient society

古代史：archaeology

古地形：ancient landform

古典：classical allusion

古典芭蕾：classic Ballet

古典风格：classicism

古典文学：classical literature

古典音乐：classical music

古典哲学：classical philosophy

古典主义：classicism

古董：antique, curio

古风：ancient customs, antiquities

古国：ancient state

古河道：fossil river course

古画：ancient painting

古迹：archaeology, archeology, monument, ancient relic

古籍：ancient books

古建筑：ancient building

古钱：ancient coins

古币：ancient money

古人：the ancients, our forefathers

古色古香：having an antique flavor, classic beauty, in ancient styles, quaint, an air of antiquity, of antique flavor

古生代：Paleozoic, the Paleozoic Era

古玩：antique, curio

古往今来：from ancient to modern times, through the ages, since remote antiquity

古文：prose written in the classical literary style, ancient style prose

古文物：antique

古物：ancient objects, antiquities, archaeology, venerable relics

古稀：seventy years of age

古雅：of classic beauty and in elegant taste, of classic elegance

古语：archaism, old saying