1. Bagatelle No. 25 in A minor (WoO 59, Bia 515) for solo piano, commonly known as Für Elise, is one of Ludwig van Beethoven's most popular compositions, and one of the most famous piano pieces of all time. It was not published during his lifetime, only being discovered (by Ludwig Nohl) 40 years after his death, and maybe termed either a Bagatelle or an Albumblatt.2. Moonlight Sonata, by name of Piano Sonata No. 14 in C-sharp Minor, Op. 27, No. 2: solo piano work by Ludwig van Beethoven, admired particularly for its mysterious, gently arpeggiated, and seemingly improvised the first movement. The piece was completed in 1801, published the following year, and premiered by the composer himself, whose hearing was still adequate but already deteriorating at the time. The nickname Moonlight Sonata traces to the 1830s when German Romantic poet Ludwig Rellstab published a review in which he likened the first movement of the piece to a boat floating in the moonlight on Switzerland’s Lake Lucerne. Beethoven dedicated the work to Countess Giulietta Guicciardi, a 16-year-old aristocrat who was his student for a short time.