英和和英

prehistoric remains

ancient relics

a thing of the past

hangovers from the 19th century

prehistoric

the remains of an ancient city

prehistoric man

Genesis

prehistoric settlements

the great discovery of the century

ancestors far removed in time, relation, or likeness

centuries ago

the century previous to the present century

early in the last century

in this past century

in the beginning of this century

cultivated since prehistoric times

a century and one half

away back in the 18th century

the Twentieth Century

enter the 21st century

from the sixth century onward

at the start of the 17th century

in [during] the last century

in the middle of the 20th century

the eighteenth century

at the turn of the century

in the twentieth century

in the third century 『B.C.』

A hundred years is called a century.