Q: Using Donato Bramante's St. Peter's Basilica and Tempietto in Rome, as opposed to the Vierzehnheiligen Pilgrimage Church in Bamburg, Germany, by John Balthasar Neumann, to argue that a rational engagement with architecture is a more effective means of understanding and understanding architectural form. During the Renaissance period, human thought and intelligence reached its peak and its effect on architectural form became clear and its involvement of the rational aspect in the building. Predominantly geometric shapes are the characteristics that can be identified. Not long after the introduction of the Renaissance period of Baroque architecture, rather than logic and reasoning they wanted to capture the emotional atmosphere using architectural elements such as light, height, craftsmanship, expensive materials and so away as mentioned by (Scotti 2007, 5-10). In my research I have reached the argument based on the comparison of St. Peter's Basilica and the Tempietto with the Vierzehnheiligen Church that the rational commitment is more successful in its meaning, than emotional in terms of forms. Scott continued by stating that it has been shown that for example a simple shape such as the circle acquires a deeper meaning due to its perfection and its centrality especially if the building celebrates an event that determines an attraction for galloping, as is evident in these buildings they all had something in common which is the focal point. St. Peter's Basilica, built on the basis of a rational architectural form, is a late Renaissance church located within the Vatican City, designed by Donato Bramante. Its significant history is that according to Catholic tradition this was the place where St. Peter was buried. Not so far... middle of the paper... understandable the use of perfect architectural form as geometry, in terms of belief and architecture. His design was straight to the point, making use of the geometric shape and its magnificent meaning which in itself emphasizes a perfect shape and a perfect central point in the centre, which in itself is a powerful commentary on the focal point of the building (point of the crucifixion at the Tempietto and the pulpit of the Basilica) this result is more effective rather than using colorful and expensive materials, gold, sculptures, paintings, large windows and light or other architectural elements used by Baroque architecture to create attraction and highlight the point of 'building .(the Altar of Grace at the Vierzehnheiligen Church)Thus rational engagement with architecture is a more effective means of understanding and comprehending architectural form.