age, era, period (of time) / the times, spirit of the age / antiquity / a time in one's life, one's days (in college etc.)

history / the study of history

Germany (a country)

dark / blackish / foolish / secret; covert / memorize; recite from memory

darkness

darkness

【Conjunction】after; on the basis of; upon

upper, over

the first volume in a two- or three-volume set

the start / a high place; the top / one with higher rank