Johann Sebastian Bach (31 March 1685 in Eisenach – 28 July 1750 in Leipzig; pronounced "BAHK") was a German composer and organist. He lived in the last part of the Baroque period. He is most famous for his work "Toccata and Fugue in D Minor", "St. Matthew Passion", "St. John Passion", "Mass in B minor", and the "Brandenburg Concertos". He spent several years working at courts of noblemen. Here he wrote most of his chamber music and orchestral music. Most of his life, however, he worked in a church where he was expected to write church music. Bach wrote almost every kind of music except opera. During the last part of his life most composers were writing in a new style called the Classical style, but Bach always wrote in the Baroque style. That made some people at the time think he was old-fashioned, but today we know that his work is the very best of Baroque music. Along with Mozart and Beethoven, Bach is regarded as one of the greatest composers who has ever lived.