Stereotomy and Composition in Maya Architecture: The Medial Moulding at the Palace of the Governor at Uxmal (Yucatán, México)

The medial moulding is a defining architectural element in monumental Maya architecture, serving compositional, structural, and constructive functions. This study examines its stereotomy, craftsmanship, and architectural role in the Palace of the Governor at Uxmal (Yucatán, México), a prime example of Late Puuc architecture. By tracing its evolution across Puuc substyles, the research explores its transformation from simple rectangular forms to complex multi-member arrangements. Based on in-situ documentation—combining direct visual inspection with digital techniques—and supported by bibliographic sources, the study identifies and classifies the masonry pieces comprising the medial moulding, analysing their geometry, standardisation, and contribution to architectural composition. The findings reveal a high degree of precision and specialisation in the carving process, demonstrating the builders’ capacity for the seamless integration of architectural components. The study ultimately underscores the medial moulding’s significance as both an aesthetic and structural unifying element.