Advent and Christmas are the "high times" of church music, for which new compositions are always desired and sought. Organists in particular have a great need for appropriate literature due to the large number of services and devotions, sacred evening music and concerts at this time, and are always on the lookout here for effective compositions that can be rehearsed in a manageable amount of time. This is where the fantasies of the present volume come in: They are particularly suitable as festive preludes and postludes to the service, which is why songs that are often sung at the opening or closing of the liturgy have been chosen for the most part, and why all the pieces are 2 to 5 pages in length with occasional suggestions for shortening. The level of difficulty does not go beyond the C level. The (neo-)romantic style of all the fantasies meets the desire of many players and listeners to enjoy melodious, harmonious music that is "to the heart" in the best sense at Christmas.