Primacy may refer to: an office of the Primate (bishop) the supremacy of one bishop or archbishop over others, most notably: Primacy of Peter, ecclesiological doctrine on the primacy of Peter the Apostle Primacy of the Roman Pontiff, ecclesiological doctrine on the primacy of the Roman See Primacy of the Five Sees, ecclesiological doctrine on the primacy of the five major patriarchates (pentarchy) Primacy of Jerusalem in Christianity, ecclesiological doctrine on the primacy of the See of Jerusalem Primacy of Canterbury, the supremacy of the Archbishop of Canterbury over the Archbishop of York Primacy of Jerusalem in Judaism, religious primacy of the Holy City of Jerusalem in Judaism Aramaic primacy, a scholarly theory in the Christian Bible studies Primacy of the House of Commons, a political system based on the primacy of the House of Commons over the House of Lords Primacy of European Union law, a legal concept in the international law Primacy effect, a concept in psychology and sociology Primacy (company), a digital marketing agency based in Connecticut, USA Primacy, a suburb of Bangor, County Down See also Primate (disambiguation) Primacy of Jerusalem (disambiguation)