"Sansoen Phra Narai" (Thai: สรรเสริญพระนารายณ์) is a music composition based on a notated piece found in Simon de la Loubère's records of the French embassy to the Kingdom of Ayutthaya in 1687, originally titled in the English version as "A Siamese Song".

King Chulalongkorn (Rama V) had a modern arrangement made by Michel Fusco in 1897, and used it as a royal anthem.

The piece was arranged as the title song for the 1941 film King of the White Elephant, under the name "Si Ayutthaya".

This arrangement was also used in the 2017 TV series Sri Ayodhaya  [th], and the march composition was used in the royal funeral of King Bhumibol Adulyadej (Rama IX) the same year.

The lyrics may have not been exactly accurate as it was written in an older Thai transcription, which in return, makes it hard to transcribe the lyrics into Thai.