The Council of Constance is the 15th century ecumenical council recognized by the Roman Catholic Church, held from 1414 to 1418. The council ended the Western Schism, by deposing or accepting the resignation of the remaining papal claimants and electing Pope Martin V.

The Council also condemned Jan Hus as a heretic and facilitated his execution by the civil authority. It also ruled on issues of national sovereignty, the rights of pagans, and just war in response to a conflict between the Kingdom of Poland and the Order of the Teutonic Knights. The Council is important for its relationship to ecclesial Conciliarism and Papal supremacy