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.