Cities are the primary building blocks of your empire. They produce Food for the population, units and buildings, trade, and light bulbs (research).

Cities (Civ1)

Chittagong is undefended.

A city with a black border has a least one unit defending it.
A gray inner border represents City Walls.

City screen (Civ1)

The City Screen is where the management of a city takes place.
Note the Big fat cross.

City view (Civ1)

The City View button gives an artistic representation of the city.