King Ramkhamhaeng or Pho Khun Ramkh

King Ramkhamhaeng or Pho Khun Ramkhamhaeng was the third King of the Phra Ruang Dynasty. The greatest achievement of King Ramkhamhaeng was the revision of various forms of Khmer alphabets into a system suitable for the writing of Thai words. The alphabet that he invented in 1283 was essentially the same as that in use today.

With the newly invented alphabet and writing system, King Ramkhamhaeng had stone tablets inscribed, telling the story of the Sukhothai Kingdom. The part that is the most quoted reads