What are Residential buildings?

This type of building increases the population and also produces gold. They occupy an area of 2x2 cells and should be located next to the road.
Important! All sections of the road chain should be connected to the main road near the Senate.
Each Residential Building can be upgraded to a second level by crystals. This will increase the population. But this is not a mandatory part of the game. More about resource "Population" and how to increase it, in this article.