National Day 1978 (Jabreen Castle)

This high-value stamp commemorates Oman's rich cultural renaissance, fine interior architecture, and scholastic history by featuring Jabreen Castle (Qal'at Jibrin). Constructed in the late 17th century by Imam Bil'arab bin Sultan al-Yarubi, this magnificent structure uniquely shifts away from purely utilitarian military fortresses to serve as a refined residential palace, an oasis court, and a premier seat of higher learning, famous for its intricately painted wooden ceilings and elegant stucco calligraphy. The detailed illustration carries a powerful message of intellectual prestige, administrative organization, and artistic depth, celebrating the golden age of Yaruba state-building. Flanked by a purple geometric arabesque border and the sovereign portrait of Sultan Qaboos, the design beautifully anchors the modern state's educational progress within its proudest ancestral institutions.