Polynesian believed gods had a physical manifestation. No gods appear to have been brought by Toa and Tapairu when they settled on Rakahanga, and it took seven generations (about 150 years) before some travellers returned with two gods. Later, a piece of red wood washed up which was believed to be a third god. Paved areas called maraes were constructed outside the villages for religious gatherings. Minor prohibitions were practiced to avoid displeasing the gods, such as dietary restrictions related to protecting species of significance to a tribal group.