The tale of Cinderella is considered one of the oldest, tracing its origins to antiquity. The version that we have come to know and love was written down in 1697 by Charles Perrault who made a few tweaks to the story, such as the pumpkin and fairy-godmother, which helped to make it a hit. By far his most famous change to the original story, glass slippers, was actually a mistake.
When he wrote down the tale he mistook vair (ermine) for verre (glass). The result was that Cinderella's "fur" slippers became "glass" and the rest is history. Perrault discovered his error eventually but it was too late, his story was already too popular to "fix".