Here is a collection of classical piano sheet music organized in levels of difficulty. All is in the public domain, so it is free to print and use. Enjoy!
Classical piano music can be divided into three main eras;
Music after that is usually called "20th and 21st century music", and even "Modern". Who knows what these periods will be called in the future?
If you're looking for a nice collection of Classical piano sheet music, I can recommend: Big Book of Beginner's Piano Classics: 83 Favorite Pieces in Easy Piano Arrangements
The pieces in the collection are simplified and for beginners. The layout is clean and easy to read and the selection of timeless masterpieces is great!
The piano pieces are graded from level 1-6 and organized in the different periods/ styles.
The pieces have been selected as some of the easiest, pedagogically sound, and
most popular classical piano sheet music by each composer.
The levels are an indication of difficulty and are based on mainstream exam levels- but don’t feel afraid of testing something a bit above your own level- this might actually help you to pull yourself to a higher level!
If you really love a piece- there is magic in what you can do! I have seen that over and over again…
Just don’t go overboard in difficulty- and keep working with your piano lesson book as well as note reading and technique at the same time.
Please observe that Level 1 is not for absolute beginners. This level is usually reached after about one year of piano playing. (If you can play these pieces easily after learning piano less time than that, it means you can feel really good about yourself : )
J. S Bach: Prelude no. 2 in d minor, BWV 926
J. S Bach: Little Prelude in c minor, BWV 934
J. S Bach: Prelude in d minor, BWV 999
J. S Bach: March in E flat major, BWV Anh. 127
J. S Bach: Little Prelude in e minor, BWV 941