Title: Piano Sonata No. 15 (Beethoven)
Content:  Piano Sonata No. 15 in D major, Op. 28, is a piano sonata by Ludwig van Beethoven. The name Pastoral or Pastorale became known through A. Cranz publishing of Beethoven's work, but was first coined by a London publisher, Broderip & Wilkinson. While not as famous as its immediate predecessor, Piano Sonata No. 14, it is generally admired for its intricate technicality as well as for its beauty. The sonata takes roughly twenty-five minutes to play with its intended repeats. Published in 1801, the work is dedicated to the Count Joseph von Sonnenfels.
Title: Piano Sonata in E major, D 157 (Schubert)
Content:  The Piano Sonata in E major,  157 is a piano sonata with three movements composed by Franz Schubert in February 1815. The Allegro  154 is an early version of its first movement.
Title: Piano Sonata Hob. XVI/15
Content:  The Piano Sonata No. 15 in C major, Hob. XVI/15, is an arrangement for Solo Keyboard of the Divertimento in C (Hob. II/11) by Joseph Haydn. This Sonata is now considered spurious.
Title: Piano Sonata No. 1 (Enescu)
Content:  The Sonata No. 1 for Piano in F-sharp minor, Op. 24, No. 1, is a piano sonata by the Romanian composer George Enescu, completed in 1924.
Title: Piano Sonata Hob. XVI/17
Content:  The Piano Sonata in B-flat major, Hob. XVI/17, is a composition that was originally attributed to Joseph Haydn, but was later considered to have been written by an unknown composer, subsequently identified as Johann Gottfried Schwanenberger.
Title: Piano Sonata No. 1 (Rachmaninoff)
Content:  Piano Sonata No. 1 in D minor, Op. 28, is a piano sonata by Sergei Rachmaninoff, completed in 1908. It is the first of three "Dresden pieces", along with Symphony No. 2 and part of an opera, which were composed in the quiet city of Dresden, Germany. It was originally inspired by Goethe's tragic play Faust; although Rachmaninoff abandoned the idea soon after beginning composition, traces of this influence can still be found. After numerous revisions and substantial cuts made at the advice of his colleagues, he completed it on April 11, 1908. Konstantin Igumnov gave the premiere in Moscow on October 17, 1908. It received 
Title: Piano Sonata No. 5 (Beethoven)
Content:  Ludwig van Beethoven's Piano Sonata No. 5 in C minor, Op. 10, No. 1 was composed some time during 1796–98. The first movement of the sonata has a meter, the second movement, and the final movement. Beethoven's Piano Sonata No. 5 is a first-period composition, anticipating more notable C minor works such as the Pathétique Sonata and the Fifth Symphony in its nervous energy. Like all three sonatas of his Op. 10, it is dedicated to Anna Margarete von Browne, the wife of one of Beethoven's patrons, a Russian diplomat in Vienna.
Title: Piano Sonata (Bernstein)
Content:  The Piano Sonata, originally entitled Sonata for the Piano, is the only piano sonata by American composer Leonard Bernstein. An early work by the composer, it was finished in 1938.
Title: Piano Sonata No. 1 (Chopin)
Content:  The Piano Sonata No. 1 in C minor, Op. 4 was written by Frédéric Chopin in 1828 (probably begun around July). It was written during Chopin's time as a student with Józef Elsner, to whom the sonata is dedicated. Despite having a low opus number, the sonata was not published until 1851 by Tobias Haslinger in Vienna, two years after Chopin's death. This sonata is considered to be less refined than the later 2 sonatas, and is thus much less frequently performed and recorded.
Title: Piano Sonata, WoO 51 (Beethoven)
Content:  The Piano Sonata, WoO 51, in C major (also called the Sonatina in C major), is an incomplete composition for piano by Ludwig van Beethoven, believed to have been composed before he left Bonn, that was discovered amongst Beethoven's papers following his death. The composition was not published until 1830 by F. P. Dunst in Frankfurt, with a dedication to Eleonore von Breuning, along with the piano trios WoO 38 and WoO 39

Question: Who was the composer of Piano Sonata No. 15?
Answer: Ludwig van Beethoven.
Beethoven.
L. van Beethoven.
Ludvig van Beethoven.
Ludwig Van Beethoven.
L. Bethovenas.
Ludwik van Beethoven.
Louis van Beethoven.
L. v. Beethoven.
L. van Betkhoven.