In this video, you will delve into one of the most important reforms the Church has undergone in its history, through which it gained freedom from imperial and feudal power. It is also called the "Gregorian Reform," named after Pope Saint Gregory VII, one of its main protagonists. During those years, serious conflicts arose, but the Church emerged profoundly transformed. In Rome, in the Basilica of San Clemente, one of the most beautiful mosaics in the city is preserved, dating back to the early 12th century. This mosaic symbolically represents the ideals of the reformed Church.