Christmas operas are operas which are thematically based on either the Nativity of Jesus or secular Christmas stories. The earliest Christmas operas appeared in the early 17th century, not long after the creation of the art form. Because of the ban on secular theatrical works during the season of Advent, these early Christmas operas, while elaborately staged, were based on religious themes relating to the Nativity. By the mid 19th century the ban on secular operas during Advent had ceased, and operas based on a wider array of Christmas themes, such as Santa Claus and King Wenceslaus, emerged. Several operas have been inspired by Charles Dickens' A Christmas Carol, including works by composers Bernard Herrmann and Thea Musgrave. The story of the Magi has also been the basis of several opera