south had settled here many millennia before the pre-contact tribes found here in the 17th century. The first structure in Ontario dedicated to worship is not a building, but an earth sculpture, made by the an earlier tribe whose belief system included the Great Serpent. The Ho-de-no-sau-nee, the People of the Longhouse, believe that the Giver of Power controlled the universe and the Great Serpent was subsequently demoted. Like their European counterparts, the various tribes in North America were engaged in blood feuds on a massive scale during the 12th, 13th and 14th centuries. The League of the Great Tree of Peace, brought about by Deganawidah, in about 1450, was the start of the Six Nations and effectively the beginning of the end of intertribal conflict. While the Neutral, Tobacco and Huron people did not join in this union, they were affected by it in their own thinking. Festivals and feast days became more focused on universal peace than they had earlier. The communal quality of the Longhouse peoples was extended to neighbouring tribes. One spiritual ritual that was unique to Ontario is Yandatsa - the Feast of the Dead. This was a Wendat festival, written about by Jean de Brbeuf in 1636. The feast took place once every ten or twelve years. At this feast the corpses of dead relatives were exhumed, transported to ,and reinterred at a common grave. All the various tribes in the area would meet at the common grave and bury their respective relatives together