Building Classical Age

Library

Scrolls and scholars. Knowledge is needed to raise the wonders of later ages.

In your city

The Library unlocks in the Classical Age. With its workers in place it makes 18 knowledge per minute. It employs 3 workers. Its upkeep is 2.4 gold per minute; with an empty treasury it runs at half strength.

Upgrades

Once it is finished, tap it and choose Upgrade to raise it a level, up to level 3. You pay up front; the work then takes a while, shown by the same bar as construction, and the Library keeps working at its old level meanwhile. From level 2 it wears its level on a stone plaque carved with Roman numerals. How upgrades work.

Library by level (Standard difficulty)
LevelPriceMakes per minuteWorkersUpkeep
1Placing it18 knowledge per minute32.4 gold per minute
245 wood90 stone90 gold31.5 knowledge per minute53.6 gold per minute
375 wood150 stone150 gold46.8 knowledge per minute64.8 gold per minute

Also in the Classical Age

Generated from the Erapolis game data, with pictures from the game itself. Numbers are per minute of game time, at Standard difficulty.