curprev16:5416:54, 18 February 2015 Hyacinthtalkcontribs 11,832 bytes+435 →History: [[File:Fifteenth chord from Marpurg on A.png|thumb|Fifteenth chord discussed by Marpurg as resulting from the addition of a ninth below a (dominant) seventh chord<ref>David A. Sheldon, ed., Friedrich Wilhelm Marpurg (1989). ''Marpurg's Thoroundo