Semois River References Semois River river, Europe Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Bouillon…southeastern Belgium, lying on the Semois River in the Ardennes. It was long known for the ducal title connected with it. Read More…southeastern Belgium, lying on the Semois River in the Ardennes. It was long known for the ducal title connected with it. Read More