made of her music. With music printing, though, a composer's music could be printed and sold at a relatively low cost to purchasers from a wide geographic area. As sheet music of major composer's pieces and songs began to be printed and distributed in a wider area, this enabled composers and listeners to hear new styles and forms of music. A German composer could buy songs written by an Italian or English composer, and an Italian composer could buy pieces written by Dutch composers and learn how they wrote music. This led to more blending of musical styles from different countries and regions. The pioneer of modern music printing was Ottaviano Petrucci (born in Fossombrone in 1466 – died in 1539 in Venice), a printer and publisher who was able to secure a twenty-year monopoly on printed music in Venice during the 16th century. Venice was one of the major business and music centers during this period. His Harmonice Musices Odhecaton, a collection of chansons printed in 1501, is commonly misidentified as the first book of sheet music printed from movable type. That distinction belongs to the Roman printer Ulrich Han's Missale Romanum of 1476. Nevertheless, Petrucci's later work was extraordinary for the complexity of his white mensural notation and the smallness of his font. He printed the first book of polyphony (music with two or more independent melodic lines) using movable type. He also published numerous works by the most highly regarded composers of the Renaissance, including Josquin des Prez and Antoine Brumel. He flourished by focusing on Flemish works, rather than Italian, as they were very popular throughout Europe during the Renaissance music era. His printing shop used the triple-impression method, in which a sheet of paper was pressed three times. The first impression was the staff lines, the second the words, and the third the notes. This method produced very clean and readable results, although it was time-consuming and expensive. Until the 18th century, the processes of formal composition and of the printing of music took place for the most part with the support of patronage from aristocracies and churches. In the mid-to-late 18th century, performers and composers such as Wolfgang Amadeus Mozart began to seek more commercial opportunities to market their music and performances to the general public. After Mozart's death, his wife (Constanze Weber) continued the process of commercialization of his music through an unprecedented