Auch die Noten der Mondscheinsonate (Beethoven) sind Public Domain :-)
Meer Notenblätter beim Mutopia Project
… a place where music is free for everyone! Download it, print it out, and share it. Mutopia is similar in spirit to Project Gutenberg, but consists of free sheet music.
Broadly speaking, copyright on a creative work expires 70 years after the creator’s death. This means that the works of Bach, Mozart, Beethoven and many other composers are in the public domain – in principle, they may be copied and performed without restriction.
However, you may not normally copy or perform a sheet music edition which you can buy, because an editor also has a copyright on the edition, and an arranger may have, too. The copyright on the edition only expires when all these people have been dead for 70 years.