Crown Prince of Thailand

The Crown Prince of Thailand (or Siam; Thai: สยามมกุฎราชกุมาร; RTGS: Sayammakutratchakuman; lit.

the royal son of Siam) is a title held by the heir apparent to the Thai throne.

Prior to this, the Siamese throne did not have a law or formal system regulating royal succession.

However, few Front Palaces succeeded to the throne this way, with the exception of King Phutthaloetla Naphalai (Rama II) in 1809.

It also re-affirmed agnatic primogeniture, or succession through the male line by seniority.

Standard of the Crown Prince of Siam (1897–1910)