Masaccio’s Holy Trinity in Santa Maria Novella, Florence, stands as a milestone in the history of Western art: the first systematic application of linear perspective to create an illusory, mathematically ordered space. No longer suspended against gold backgrounds, the sacred figures inhabit an architectural vault grounded in rational geometry. Here, faith and reason converge, inaugurating the Renaissance vision of a divinity that coexists within human-centered reality. Monumental, solemn, and rigorously composed, this fresco marks the birth of spatial realism and a new devotional experience. The piece recalls the buon fresco technique with receding arches, volumetric figures, and harmonious geometry. Pepe enters Masaccio’s sacred vault, his ironic presence disrupting the solemnity yet still contained within the precision of the perspectival grid.