Clio is one of the nine muses, personifications of the highest aspirations of art and intellect in Greek mythology. The Muses were the daughters of Zeus and Mnemosyne, the Titan goddess whose name means memory. When the Romans later separated the muses' fields of inspiration, Clio became the patron of history. Her symbols are a laurel wreath and a scroll.
(http://www7.tamu-commerce.edu/history/Clio.htm)