The Taq Kasra, also known as the Arch of Ctesiphon, is an ancient architectural structure located near the modern city of Al-Madain in Iraq. It was built during the Sasanian Empire around the 6th century AD and is renowned for its impressive brick arch, which is one of the largest of its kind in the world. The arch served as a part of the palace complex of the Sasanian kings and exemplifies the engineering skills of the time. This monumental structure is a significant symbol of Persian architecture and has influenced various architectural styles throughout history. The Sasanian Empire was known for its advancements in art and architecture, and the Taq Kasra remains a testament to their legacy. Today, it attracts historians and tourists alike, highlighting the rich cultural heritage of ancient Persia.