Patterned Square Green Agate Stone Bearing the Ottoman State Coat of Arms Silver Beautifully representing the history and splendor of the Ottoman Empire is this Ring Siding Ottoman Tughra for Men. The Ottoman Empire ruled over modern-day Turkey, the Balkans, and a portion of the Middle East for over 600 years, making it the largest and longest-lasting Islamic Empire in history. The tughra (or crest) of the Ottoman Empire was the Sultans' official seal and a common symbol of their power. A stunning square green agate stone sits at the center of this ring, which is a replica of the tughra with intricate details of the emblem. This one-of-a-kind piece of Ottoman jewelry features a silver face etched with a tughra design, and a traditional band. It's a stunning fashion statement and a classic nod to the Ottoman Empire's legacy thanks to its exquisite craftsmanship. This ring's magnificent design and eye-catching green tones make it appropriate for any event.