J.S. Bach gave the title "The Well-Tempered Clavier" to a collection of solo keyboard music he composed. Specifically, this collection consists of preludes and fugues in all 24 major and minor keys. This book was completed in 1722. In 1742, Bach made another such collection and again compiled them into a book he named "Twenty-four Preludes and Fugues". Thus the characters of the two books reflect two different periods of Bach's life. Nowadays, the two books are considered to make up a single referred to as "The Well-Tempered Clavier". It is generally regarded as being among the most influential works in the history of Western classical music. Source:
The Well-Tempered Clavier. (n.d.). Retrieved November 25, 2014, from http://en.wikipedia.org/wiki/The_Well-Tempered_Clavier
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Arithmetica is a Greek book on mathematics written by Diophantus in 3 B.C. It originally was a collection of 13 books but only 6 of them have survived. In 1968, 4 previously unknown books of Arithmetica were found in the shrine of Imam Reza in northeastern Iran. Arithmetica includes 130 algebraic problems and the equations in it have a form now called diophantine equations. Source:
Arithmetica. (n.d.). Retrieved November 25, 2014, from http://en.wikipedia.org/wiki/Arithmetica |