Ludwig van Beethoven was born in Bonn, Germany on 16th December, 1770 and he died in Vienna, Austria on 26th March 1827. He was a great composer, as well a distinguished pianist who composed 32 piano sonatas. One of the piano sonatas is this research topic. This research paper is written and designed for Piano Sonata No.8 in C minor, Op.13 "Pathétique" on today's Grand Piano. The objectives of this research paper are to examine the performance practice of Beethoven's early sonata on today's grand piano, to analyze the movements, to analyze the recording of pianists who played his piano sonata and whether they have interpreted it according to the score, as well to analyze which version or edition of the score is best used on today's grand piano. After completing all the objectives of this research, it can be seen which pianists manage to interpret the piano sonata according to the score and which edition of the score is best used on today's grand piano.