In Greece and Rome the earliest books were written on tablets of wood or pieces of bark covered with wax, and writing was possible upon them with a small stick called "stylus". In Assyria and Babylonia clay tablets were used for writing and the words were drawn with a piece of wood. After baking, the tablets were kept on shelves. They were long-lasting and some of them survived until the present day. The earliest books of the ancient world were written on papyrus and skins of young animals. These books took the form of a long strip, roiled from one cylinder to another. Though paper has been known in China since the first century, the secret of papermaking came to Europe much later. Books were popular in ancient Rome: there were many booksellers and the first public library was founded there about 39 B.C. Only the rich could buy books or make their slaves copy books from important libraries. By the time, of the Middle Ages all books were handwritten, beautifully decorated, but they were often chained to the shelves. But only few people could read them. First printing was invented in China and by the end of the 15th century there were more than 200 presses in Europe. The early printers were not only craftsmen but also editors, publishers and booksellers. The first printing, press in England was set up by William Caxton at Westminster in 1476. And the first printing press in Russia — by Ivan Fedorov in Moscow in 1564.