The heresy of the Free Spirit was a pantheisticheresy of the European middle ages. The group practicing these beliefs was known as the Brethren of the Free Spirit.
Further reading:
Robert Lerner, The Heresy of the Free Spirit in the Later Middle Ages (Berkeley, 1972)
... is characterised by the extensive low-lying Amazon Rainforest in the north, and a more open terrain of hills and (low) mountains to the south, home to most ...