Chopin's Piano Sonata No. 2 in B-flat minor, Op. 35, popularly known as The Funeral March, was completed in 1839 at Nohant, near Châteauroux in France. However, the third movement, whence comes the sonata's common nickname, had been composed as early as 1837.
Perhaps the most famous of all of Chopin's piano music. It was played at his own funeral at Paris s Père Lachaise Cemetery; has been used at the funerals of politicians such as John F Kennedy and Winston Churchill; and appeared many times in popular culture.
The tempo should remain steady throughout - don't rush! The left hand should hardly move, the fingers maintaining close contact to the keys and providing an even accompaniment. The right hand will need to be played with a little more weight than the left to bring out the melody. The dynamic changes are especially important. Don't be afraid to play quite loudly when required, but remember that the key to good dynamics is contrast - fortes will not need to be so big if you can also control the piano sections.