The Symphony No. 5 in D major/D minor, Op. 107, known as the Reformation, was composed by Felix Mendelssohn in 1830 in honor of the 300th anniversary of the Presentation of the Augsburg Confession. The Confession is a key document of Lutheranism and its Presentation to Emperor Charles V in June 1530 was a momentous event of the Protestant Reformation. This symphony was written for a full orchestra and was Mendelssohn's second extended symphony. It was not published until 1868, 21 years after the composer's death – hence its numbering as '5'. Although the symphony is not very frequently performed, it is better known today than when it was originally published. Mendelssohn's sister, Fanny Mendelssohn Hensel, chose the name Reformation Symphony. History In December 1829, a year before the King of Prussia Frederick William III had even announced the tercentennial Augsburg celebrations, Mendelssohn began work on the Reformation Symphony. Mendelssohn hoped to have it performed at the festivities in Berlin which took place on 25 June 1830. He had intended to finish the composition by January 1830 and tour for four months before the celebrations began in June. However, his ill health caused the Reformation Symphony to take longer to compose than he had initially expected. In late March the symphony was still in a state of fabrication, and in an inauspicious turn of events Mendelssohn caught measles from his sister Rebecka. With a further delay of the composing and touring, Mendelssohn eventually completed the symphony in May. Unfortunately, it was too late for the Augsburg commission to recognize the symphony for the celebrations. Some authorities have suggested that antisemitism may have played a role in the symphony's absence from Augsburg. But the successful competitor, Eduard Grell, had already established himself as a competent and successful composer who was gaining considerable popularity in Berlin. Grell was extremely conservative in his compositions; his piece for male chorus perhaps matched what the Augsburg celebrations demanded, in contrast to Mendelssohn's extensive symphony, which may have been thought inappropriate at the time. Mendelssohn resumed his touring immediately after he had completed the Reformation Symphony. In Paris, in 1832, François Antoine Habeneck's orchestra turned the work down as 'too learned'; the music historian Larry Todd suggests that perhaps they also felt it to be too Protestant. He did not offer the symphony for performance at London. During the summer of 1832, Mendelssohn returned to Berlin