One usually believes that the term “classical music” refers to art music originating from the Renaissance period. However, this label is incorrect as this genre of music encompasses music spanning several epochs (Baroque, Classical, Romantic, Modern ….). Thus, Mozart belongs to the Classical era as Jean-Sébastien Bach is of the Baroque period.
The French Marquise de Créquy wrote in her book "Souvenirs", that the song ''Grand Dieu Sauve Le Roi'', was written by Jean-Baptiste Lully. According to the Marquise de Créquy, Lully created the song to celebrate the success of an operation to remove an anal fistula from the French king Louis XIV.