Oldest known banknote
The oldest known banknote in the world comes from China and was made in the 14th century out of paper from the mulberry tree.
The first real paper money was already being used in the Chinese province of Szechwan in 1024. We don't know what these notes looked like since none has survived.
The invention of paper money by the Chinese had no effect in Europe. When Marco Polo came back home after living for more than 20 years at the court of the Emperor of China, he told stories of his experiences and adventures. But when he told people about the use of paper money, nobody believed him. In fact it would be more than 100 years before paper money was finally introduced to Europe.