An engineering-grade 3D "Digital Twin" of the Chickamauga bronze bas-relief, situated on the Carrara marble monument of General William Haines Lytle in Spring Grove Cemetery (Cincinnati, OH). This high-fidelity capture documents the severe chemical weathering and oxidation of the 19th-century bronze artifact. It was processed specifically for the American Digital Heritage Project to provide local educators with interactive, browser-based STEM models for studying chemical reactions, hydrological erosion, and material degradation. * Archive: The American Digital Heritage Project * Capture Method: Close-range photogrammetry * Location: Spring Grove Cemetery, National Historic Landmark