Opus quadratum

Opus quadratum is a fancy way to talk about building things with squares. Imagine playing with building blocks, but instead of different shapes like triangles or circles, you only have perfect squares.

Now imagine you want to build a wall or a floor with these squares. You would line them up side by side, creating neat rows like in a checkerboard pattern. This is what the Romans did when they built things with opus quadratum.

But there's a catch - since the squares are all the same size, you have to make sure they fit together perfectly. This means you have to be very careful when measuring and cutting the squares, so they're all exactly the same size.

Opus quadratum was a popular way to build things because the squares fit so neatly together, creating a strong and even surface. It might not be the most exciting way to build, but it sure does make things look nice and neat.