What constitutes the theme of Christmas is Santa Claus and the gifts he is believed to distribute. The most popular Christmas party theme is usually based on this belief. The pine tree bought for Christmas is decorated and the gifts are left under it. Since it is widely believed that Santa Claus enters the house through the chimney, specially designed stockings for Christmas are hung above the fireplace. One of the most common themes of Christmas parties is deer figures, as it is also believed that Santa Claus rides his sleigh with reindeer.