The Ancient and Auspicious Order of the Nine Gems (Thai: เครื่องราชอิสริยาภรณ์อันเป็นโบราณมงคลนพรัตนราชวราภรณ์; RTGS: Khrueang Ratcha-itsariyaphon An Pen Borannamongkhon Noppharat Ratchawaraphon) was established in 1851 by King Mongkut (Rama IV) of the Kingdom of Siam (now Thailand). The order is bestowed upon the members of the Thai royal family and distinguished high-ranking officials who have given service to the kingdom and who are active Buddhist laypeople. In practice, it is the highest Thai order granted to Thai citizens, as the two higher orders are reserved for royalty or foreign heads of state.