This international influence was made possible by the 
     invention of music-printing about 1500. This produced as 
     great a revolution in the history of music as book-printing 
     had done in the history of general European culture. A 
     quarter of a century after Gutenberg’s first attempts, 
     German and Italian printers produced printed missals. The 
     decisive step—the printing of the notation of measured 
     music from type—was taken by Ottaviano dei Petrucci of 
     Fossombrone . . . at Venice. . . . Venice . . . remained the 
     principal centre for the printing and publishing of 
     polyphonic music.