Frédéric-Adolphe-Maximilien-Gustave Salvemini de Castillon (22 September 1747 - 27 January 1814^[1]) was a music theorist.

He was born in Utrecht, Netherlands. His father was the professor Giovanni Francesco Salvemini, who taught mathematics and philosophy at the University of Utrecht. Giovanni adopted the name "de Castillon" in reference to his natal town of Castiglione in Tuscany, Italy.

Member of the Berlin Academy, Castillon published a large volume of Research of the Beauty of applied music to, melody, harmony, and rhythm.^[2]

Likewise his father, Castillon contributed to the creation of the Encyclopédie, ou dictionnaire raisonné des sciences, des arts et des métiers of Diderot and D'Alembert, the accurate creation of his articles in the domain of applied arts of music theory, musical instruments, and its history; paved for Frederick his place in the world of music historians. He died in Berlin.