'The Floating Moon on the Sky') is a composition of Thai classical music traditionally credited to King Rama II.

According to the traditional story, the King had a dream in which he saw the moon floating toward him and then heard beautiful music.

Upon waking up, he played the music he heard in the dream and had court musicians arrange and remember the piece.

[1] In 1871, King Chulalongkorn (Rama V) had a Western arrangement of the song adopted as the royal anthem, and it became known as "Sansoen Phra Barami".

King Vajiravudh (Rama VI) later had another arrangement, with new lyrics, adopted as the march of the Wild Tiger Corps in 1911, and it became known as "Sansoen Suea Pa".