Then, Dr. Survilla pointed out something very important and that was the vast majority (and I mean VAST) of people in the Middle Ages were illiterate. Thus, all the artwork, frescos, and displays in this cathedral were deliberate in what they were trying to convey to the pilgrims and parishioners and this doesn't start inside. All three entrances to the cathedral (north, south, and west) all convey a different theme to those who enter. For instance, the western entrance of Burgos displays the conception and coronation of the virgin; the southern entrance, the twelve apostles and the Transfiguration; and the northern entrance, the "humanity of Jesus" in tandem with Mary and Saint John. In other words you got a sense of the overall story just by walking around the outside.
I have no doubt that by the time the pilgrim reached the end of the Camino (and if they had taken the time see some of the churches along the way) they had probably seen the story of Jesus a dozen times over. Thus, the pilgrim went through the roller coaster of emotions associated with the Gospels just as many times, but rather than dulling the senses to the emotion, I can attest from my own experience that a great appreciation and hope has arisen from these multiple exposures. It is more than likely that the pilgrimage was the first time a Christian could truly understand and connect with the story of Jesus. When your entire service is in Latin and all the Medieval citizen can discern is the Eucharist you probably never actually heard the Gospel. Certainly your church had a main altar, probably with the scene of the crucifixion, but beyond that a person could not read the Bible (or any other book for that matter) and truly comprehend the series of events culminating in Jesus.
For all the corruption and deceit that is often associated with the Medieval Church, artwork and architecture had the best intentions of strengthening the Christian in his or her faith. Burgos Cathedral was not alone in this goal, but it definitely was and still is unique in the way it conveys the story of Jesus.