In architectural terms, the void is a blank space implied in the overall architectural form, created by subtracting masses from the interior volume and exterior development. My project compares how the void is applied in two buildings: The Pantheon, a classical building completed between 126-128 A.D., and San Carlo Alle Quattro Fontane (San Carlino), a Baroque church completed in 1646. Both buildings are located in Rome, Italy. The void space can have powerful spatial implications, such as the dome that dominates the interior space in both buildings and the narrow streets. Although there is an overall similarity between the domes, the interiority and site context of the Pantheon and San Carlino differ in how they use the architectural void to amplify the experience. I will analyze the use of the void in these examples through a series of diagrams that depict how the void is expressed in components such as circulation, scale, symmetry, light, and acoustics. The overall objective is to comparatively analyze how the void amplifies user experience. I plan to evaluate how the void intensifies interiority and exteriority through two-dimensional drawings and diagrams highlighting architectural effects. Primary sources will come from first-hand experience visiting these two spaces and first-hand accounts of travelers who encountered, sketched, and photographed the Pantheon and San Carlino. Secondary sources will come from architectural drawings, including plans, sections, and elevations.