Johann Sebastian Bach

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

Johann Sebastian Bach, born March 31, 1685 in Eisenach and died July 28, 1750 in Leipzig, was a German composer and organist of the late Baroque period. From 1723 until his death he served as Thomaskantor, the director of music for Leipzig's main Lutheran churches and the St Thomas School, a post that required him to compose new music for every Sunday and feast day of the church year, an ongoing institutional demand rather than the occasional commission most composers of the period worked under.

That weekly obligation shaped the scale of what Bach produced over his nearly three decades in the post: a working composer bound to a church calendar rather than to his own creative timetable, writing cantatas, motets and larger liturgical works to a fixed institutional schedule that left comparatively little room for music written purely on his own initiative, though the largest and best known of his works still emerged from within exactly that constrained, calendar bound working life.

Leipzig itself, rather than any single patron, was the employer that shaped Bach's middle and later career this way: a municipal and church post rather than a court appointment, answerable to a city council and a church consistory rather than to one aristocratic taste, which is part of why the surviving Leipzig output reads as liturgical infrastructure built to serve a whole worshipping city year after year rather than music composed to please one employer's personal preference.

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

Bach's surviving output includes the Brandenburg Concertos, the Goldberg Variations, the Mass in B Minor, two surviving Passion settings, and more than 190 surviving church cantatas of an original cycle that likely numbered near 300, a body of work assembled almost entirely within the working demands of his Thomaskantor post rather than as music written for its own sake outside any institutional obligation. The gap between what survives and what the post likely required him to produce, roughly two thirds of the cantata cycle surviving against the full original count, is itself part of how his historical reputation later had to be reconstructed from an incomplete record.

He was largely known in his own lifetime as a virtuoso organist rather than as a composer of the first rank, a reputation the nineteenth century Bach revival later reversed completely: the same body of liturgical and instrumental work that his own contemporaries treated as workmanlike church duty became, within a century of his death, the material later musicians and audiences would treat as among the highest achievements of Western composition.