Caesar II is set in the time of ancient Rome, and lets you try to be the next Caesar. You start with one province and have to build an efficient city. To do this you'll have to manage the water supply properly, make sure the city is policed well, and provide adequate education, entertainment, baths, and temples (which also hold your money and can be robbed if you don't have enough protection).
The City Building series is the collective name of a series of historical city-building games for personal computers developed by Impressions Games, BreakAway Games, Tilted Mill Entertainment (following Impressions' demise), and published by Sierra Entertainment. It includes Caesar, Pharaoh, Zeus, Emperor.