In anatomy of animals, the archipallium the oldest region of the brain's pallium.

The archipallium is often considered continguous with the olfactory cortex, but the extent of archipallium varies among species. In older species, such as fish, the archipallium makes up most of the cerebrum. Amphibians develop archipallium and paleopallium, whereas reptiles develop archipallium, paleopallium and a primitive neopallium.

See also: Regions in the human brain