Cyantotype, an alternative process photography class, is offered from 10 a.m. to 3 p.m., Saturday, Jan. 6, in the Fireplace Room at The Matthews (second floor). Seth Harwood of Spearfish is the instructor. The class is offered to persons 16 years and up. The class costs $40 per person (plus tax). All materials are provided. Registrations must be confirmed by Dec. 31.