Masonry

In-Game Text
"...but the third little Hearthling built his house out of bricks."

Masonry allows you to construct brick walls.

What it does:
Masonry allows you to construct a number of things, such as:

Build > Walls and Fences


 * Brickwall

As of the update just before World 4 Masonry can be used to pave with bricks instead of stone