The Imperial Seal of Mongolia is a seal (tamgha-тамга) that was used by the Mongols. The imperial seals had inscriptions in Mongolian script or other scripts that used in Mongol regimes.
According to Plano Carpini, the Russian handicraftsman, Kozma, made a seal for Güyük Khan. This seal might have been a seal used to stamp the letter to Pope Innocent IV.
The Polish scholar, Cyrill Koralevsky, shot a photo of the seal in 1920. The prominent French Mongolist, P.Pelliot, translated the Mongolian scripts on the seal later. However, the Mongolists believe that Kozma made only one of the imperial seals and a seal on the letter is Genghis Khan's, which inherited to his successors.[1]
During the Yuan Dynasty which ruled whole China, there were several seals. Ayushridar had a imperial seal with the script "Northern Yuan". In 16th century, the Mongolians used square-shaped seal. Ejei Khan gave one of those seal to the Manchus in 1635, who in turn established the Qing Dynasty.
Bogd Khan had a tamgha (seal) with the inscription "Holiness - Bogd Khaan who holds religion and authority" in the 20th century.