J.S. Bach came to Weimar more than 300 years ago and spent nine important years of his life there. His sons Wilhelm Friedemann and Carl Philipp Emanuel were born in Weimar. This is also where he composed three-quarters of his organ works as well as numerous cantatas and harpsichord works. He was court organist and concertmaster, it was the first time he had a trained orchestra at his disposal. In Weimar he began working on his "Orgelbüchlein" (Little Organ Book). Numerous events, such as the Bach Festival in Thuringia in March and April, the Bach Biennale in July and the organ concerts in the pre-Christmas period pay homage to the great composer.