An exterior, eye-level, slightly upward-angled shot captures the north face of the Central Library (Biblioteca Central) at the National Autonomous University of Mexico (UNAM) in Mexico City, Mexico

An exterior, eye-level, slightly upward-angled shot captures the north face of the Central Library (Biblioteca Central) at the National Autonomous University of Mexico (UNAM) in Mexico City, Mexico. The building is a multi-story concrete structure under a partly cloudy blue sky. The upper section of the building is dominated by a monumental mosaic mural by Juan O'Gorman. The mural features intricate designs in various earthy tones, blues, and greens, depicting a synthesis of Mexican culture and scientific knowledge. Prominent within the mural are two large circular motifs representing cosmological theories: one labeled "PTOLOMEO" (Ptolemaic, geocentric) on the left, and another labeled "COPERNICO" (Copernican, heliocentric) on the right. These are surrounded by diverse iconography including figures, symbols, and architectural forms. A concrete band separates the mosaic from the lower two visible floors. The ground level features two distinct window arrangements: a large, multi-paneled section on the left with square windows displaying varying amber and light brown hues, and a horizontal strip of clear glass windows on the right. A recessed entrance with supporting concrete columns is visible on the lower right. Dark, textured stone cladding covers the walls immediately surrounding this entrance. Approximately four individuals are visible near the ground-level entrance on the lower right, appearing to enter or exit the building. One person wears a light-colored jacket with a graphic design on the back. The scene is illuminated by natural daylight.