The papal archbasilica major Liberian archpriest of Santa Maria Maggiore, known simply by the name of "basilica of Santa Maria Maggiore" or "basilica Liberiana" (because on its site it was thought there was a cult building erected by Pope Liberius, what however denied by investigations carried out under the pavement), it is one of the four papal basilicas of Rome, located on the top of the Esquilino hill, on the peak of the Cispio, between the Rione Monti and the Esquilino. It is the only basilica in Rome to have preserved the primitive early Christian structure, albeit enriched by subsequent additions. The archpriest of the basilica is Cardinal Stanisław Ryłko, while the honorary protocanon is by right the king of Spain.