Arnulf III References Arnulf III count of Flanders 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: Robert I…prisoner, and her eldest son, Arnulf III, was slain. Robert obtained from Philip I the investiture of Crown Flanders and from Henry IV the fiefs that formed Imperial Flanders. Read More…prisoner, and her eldest son, Arnulf III, was slain. Robert obtained from Philip I the investiture of Crown Flanders and from Henry IV the fiefs that formed Imperial Flanders. Read More