Original: Pachelbel's Canon, also known as Canon in D major, or more formally Canon and Gigue in D major for three Violins and Basso Continuo (Kanon und Gigue in D-Dur für drei Violinen und Basso Continuo), is the most famous piece of music by Johann Pachelbel.
Simplified: Pachelbel's Canon (also known as Canon in D major or just Canon in D) is the most famous piece of music by Johann Pachelbel.