Mud-Brick Pyramid is a monument type in Pharaoh.
The mud-brick pyramid is built in a near-identical way to the true pyramid: peasants clear the earth until they expose bedrock, cut grooves and fill them with water to level the site, fill the grooves with rubble, and then cut a tomb.
Mud-brick pyramids are unusual in that they require all three construction guilds to build. Stonemasons and bricklayers then lay stone and brick moved there by peasants from storage yards (said storage yards must have at least four blocks of stone). Every subsequent level requires a carpenter to build a ramp so that the stones or bricks can be lifted to higher levels.
The outermost layer of the pyramid requires limestone instead of brick. While the lowest levels require more brick than limestone, the ratio shifts towards limestone towards the higher levels, to the point that only limestone is used for the last couple of layers. Therefore, while a mud brick pyramid initially requires more bricklayers than stonemasons for optimal construction speeds, but over time fewer bricklayers are needed relative to stonemasons. In addition, after laying all of the blocks, stone masons then cut and polish the outer layer of the pyramid until it is smooth--a process which does not involve bricklayers.
Mud-brick pyramids became prominent in the Middle Kingdom, as they were cheaper to erect than traditional pure-stone pyramids. However, the consequence was that such pyramids were much less structurally stable, leading to their collapse over time. No mud-brick pyramid stands today; most are reduced to piles of rubble at best.