Issued by the United Arab Republic (UAR), this 20 milliemes definitive stamp features Bab al-Futuh, one of the grand northern gates of Cairo’s historic city walls, dating back to the 11th century Fatimid era. The olive-green design highlights the monumental twin towers and arched gateway, symbolizing Egypt’s deep architectural heritage. The bilingual inscriptions in Arabic and English (“UAR” and “POSTAGE”) represent the brief union of Egypt and Syria (1958–1961) under the UAR name. This stamp remains a fascinating relic of both medieval Cairo’s fortifications and the mid-20th-century pan-Arab political movement.