Paradise trees
Not until the Renaissance are there clear records of trees being used as a symbol of Christmas—beginning in Latvia in 1510 and Strasbourg in 1521. Legend credits the Protestant reformer Martin Luther with inventing the Christmas tree, but the story has little historical basis.
The most likely theory is that Christmas trees started with medieval plays. Dramas depicting biblical themes began as part of the church's worship, but by the late Middle Ages, they had become rowdy, imaginative performances dominated by laypeople and taking place in the open air. The plays celebrating the Nativity were linked to the story of creation—in part because Christmas Eve was also considered the feast day of Adam and Eve. Thus, as part of the play for that day, the Garden of Eden was symbolized by a "paradise tree" hung with fruit.