The Peter Cornelius Conservatory is the conservatory in Mainz, the capital of the German state Rhineland-Palatinate. It dates back to a first conservatory founded around 1882. It is named after the composer Peter Cornelius who was born in Mainz. It trains both professionals and amateurs, focused of the interplay of both aspects of music-making.

Carl August Peter Cornelius was a German composer, writer about music, poet and translator.