Cupola Bricks are building blocks that can be used to build a cupola, a small turret or dome on a building. Cupolas have been around for centuries and can be found in many types of architecture, including churches, cathedrals, and castles. Cupola Bricks come in a variety of shapes and sizes. There are triangular and round bricks as well as bricks that come in long, square, or triangular shapes. A few of the bricks include 3D shapes that can be cut into different sizes to build up the desired shape.