The Court of Rome codified and standardised a Ceremonial that had been in existence since the Middle Ages, being compiled and drafted at the end of the 15th century. In 1563 Gregory XIII moved in this direction by creating the Congregazione deiCerimoniali, an institution reformed by Sixtus V in 1588 and subsequently by other Popes, to the point of regulating the entire pontifical court on the basis of a strict protocol. One of the most significant ceremonies was that carried out during the canonisation process. After approval by the Congregazione dei Riti, the Bull of Canonisation was published, in which essentially all the practical details of the ceremony (day, time, iconography, etc.) were set out. The act of proclamation of a new saint required magnificence and pomp to honour God, the Pope, the saint and the promoters of the cause. All this by means of a sumptuous ceremony where scenographic effects, ephemeral architecture, symbols, emblems, paintings, music, etc., acted together to vindicate Rome as caput mundi and theatre of the world.