Kasra is a prominent architectural feature in Persian architecture, particularly known for its use in ancient structures. It refers to a type of arch or vault that is characterized by its semi-circular shape, allowing for large open spaces in buildings. The most famous example of a Kasra is the Taq Kasra, which is part of the ancient city of Ctesiphon in modern-day Iraq. The design of Kasra has influenced various architectural styles throughout history, showcasing the ingenuity of ancient builders. Its construction often involved the use of brick and mortar, enabling the creation of impressive structures that have stood the test of time. The Kasra remains a symbol of the rich cultural heritage of Persia.