Plato was a philosopher in Classical Greece and the founder of the Academy in Athens, the first institution of higher learning in the Western world. He is widely considered the most pivotal figure in the development of philosophy, especially the Western tradition. Unlike nearly all of his philosophical contemporaries, Plato's entire work is believed to have survived intact for over 2,400 years. Others believe that the oldest extant manuscript dates to around AD 895, 1100 years after Plato's death. This makes it difficult to know exactly what Plato wrote.
Clara Schumann was a German musician and composer, considered one of the most distinguished pianists of the Romantic era. She exerted her influence over a 61-year concert career, changing the format and repertoire of the piano recital and the tastes of the listening public. Her husband was the composer Robert Schumann. Together they encouraged Johannes Brahms. She was the first to perform publicly any work by Brahms. She later premiered some other pieces by Brahms, notably the Variations and Fugue on a Theme by Handel. Clara Schumann was featured on the 100 deutsche marks banknote from 2 January 1989 until the adoption of the euro, on 1 January 2002.