Diocletian window

Diocletian windows are special windows that are shaped like half circles. They were named after a Roman Emperor named Diocletian who really liked this shape of window.

Imagine a circle cut in half, and one of the halves is put into a wall as a window. That's what a Diocletian window looks like!

These windows were first used in the Roman Empire and were really popular during the Renaissance era, which is a special time in history when people became interested in art, science, and new ideas.

Nowadays, Diocletian windows can be found in historic buildings like museums, churches, and palaces. They are considered an important part of architectural design and can add a lot of beauty to a building.