Issued by the United Arab Republic, this 15 millieme stamp features the majestic Mosque of Muhammad Ali in Cairo, one of the most iconic landmarks of Islamic architecture in Egypt. The design shows the mosque’s large central dome and elegant minarets framed beneath decorative arches, reflecting classic Middle Eastern architectural artistry. Printed in a rich brown tone, the stamp captures the grandeur of the Citadel mosque and symbolizes cultural heritage during the UAR period. This issue is part of the definitive series used widely for everyday postage. For collectors, it represents an interesting historical period when Egypt and Syria formed a political union.