全盛 ぜんせい時代 じだいじゃなかったです
zenseijidaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 全盛時代

1. Wasn't at its peak.; Wasn't prosperous.; Wasn't in its prime.

Past/Perfective
Negative
Polite
Casual Register