The holiday film "A Heidelberg Christmas" was filmed in the historic city of Heidelberg, Germany. The picturesque streets and stunning architecture provided the perfect backdrop for this festive and romantic story. Heidelberg's beautiful landscapes and charming town squares served as the ideal setting for the film's romantic and whimsical scenes. The film's Christmas market, which was featured throughout the movie, was based on the actual Heidelberg Christmas Market, which takes place in the old town square.