Arch of Ctesiphon (Taq Kasra) - 25 fils

Issued in 1967 as part of the International Tourist Year 1967 series, this stamp commemorates the Arch of Ctesiphon (Taq Kasra), one of the most impressive surviving monuments of the Sassanian Empire. Located near modern Baghdad, the structure formed part of the royal palace complex at Ctesiphon, the capital of the Sassanian rulers. Its massive brick arch is considered one of the greatest achievements of ancient Persian architecture and remains one of the largest single-span brick vaults ever constructed.

By issuing this commemorative stamp, the Republic of Iraq showcased an outstanding monument of the ancient civilizations that flourished within its borders. The issue promoted Iraq's archaeological heritage and encouraged international appreciation of the country's historical treasures, emphasizing the significance of preserving monuments that reflect thousands of years of human civilization.