If you love Canadian history and music, you will most find this site most fetching. Created by the Library and Archives Canada, the site brings together intriguing and historically important sheet music from the past 150 years. The collection exists due to the diligence of Helmut Kallmann, a young CBC music librarian who began to collect sheet music in the early 1950s. Today, the archives contain...

"The string quartet, for two violins...was one of the most widely-cultivated genres of chamber music during the Classical period, with...Haydn, Mozart and Beethoven all contributing substantially to the literature." The Rare Book, Manuscript, and Special Collections Library at Duke University Library has made available a lovely online collection of sheet music for the string quartet published...