The poem, which has been called "arguably the best-known verses ever written by an American", is largely responsible for the conception of Santa Claus from the mid-nineteenth century to today, including his physical appearance, the night of his visit, his mode of transportation, the number and names of his reindeer, as well as the tradition that he brings toys to children. Prior to the poem, American ideas about St. Nicholas and other Christmastide visitors varied considerably. The poem has influenced ideas about St. Nicholas and Santa Claus beyond the United States to the rest of the English-speaking world and beyond. (Wikipedia)
