Pablo Casals, the eminent cellist, conductor, and composer, has many synonyms attached to his name. He is famously known as Pau Casals in his native Catalan tongue, which also translates to Paul Casals in English. Another popular synonym for Casals is the "Maestro of the Cello," given his influential role in transforming the cello from a mere accompaniment instrument to a solo instrument. Casals was also referred to as the "Godfather of Modern Cello Playing," as he is credited with expanding the cello repertoire and virtuosity. Lastly, Casals is remembered as a proud advocate for peace and was also hailed as a political activist, earning the nickname "Musician of Conscience".