 From 2005 to 2011 the stadium was called Reyno de Navarra by its sponsor, the Government of Navarre, using the medieval Spanish spelling "reyno" instead of the modern "reino" ("kingdom", derived from "rey", "king") which lent it a somewhat archaic touch.The inauguration of the El Sadar Stadium took place on September 2, 1967 with a match between Real Zaragoza and Vitoria de Setúbal from Portugal.The stadium replaced the San Juan stadium that was sold the previous year.