Depicts an outer view of Sira Fortress over the hill on Sira Island with its name and date below encircled by country name in Arabic and English.

Sira Fortress, known as قلعة صيرة in Arabic, is a military installation situated in Aden, Yemen. Originally constructed in the 11th century, it remains in active use by the Yemeni military to this day. Positioned on Sira Island, a rugged and towering volcanic formation dominating the old harbor of Aden, the fortress is often referred to as a castle, though it primarily serves as a fortification. Despite its historical significance, limited archaeological studies have been conducted on the site, leaving much of its past shrouded in mystery. One theory suggests that construction began around 1173 under the supervision of Prince Othman Al-Zangabili Al-Takriti, a Turkish ruler of Aden. The fortress withstood numerous attacks, notably by the Portuguese and Turks in 1517. Despite changes in the city's commercial center and the silting of the ancient harbor, the British continued to maintain and expand the fortress following their arrival in 1839. Accessible via a 15-minute climb up steep stairs, the fortress is a popular tourist destination in Aden.

Denomination in a circle, legend "BANK OF YEMEN" in Arabic and English.