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Biodeterioration caused by filamentous fungi is often a threat to the architectural heritage (i.e. tombs and historic sites). To specifically understand the deterioration phenomena caused by microorganisms in tombs and how these are shaped due to various environmental factors, the fungal communities in the coffin chamber of the Chinese emperor Yang (BC 569–618) were investigated at different heights using denaturant gradient gel electrophoresis (DGGE) fingerprinting. The associated environmental conditions, such as humidity, temperature, height and illumination, were also assessed. The results showed that a great diversity of fungal species ( Cordyceps ,  Fusarium ,  Harpochytrium ,  Emericellopsis ,  Volutella ,  Cladosporium ,  Stachybotrys ,  Trichoderma ,  Cochlonema  and two unknown fungal species) was present in emperor Yang’s coffin chamber. The predominant species were  Stachybotrys ,  Fusarium ,  Trichoderma  and  Cochlonema . Redundancy analysis (RDA) indicated that humidity, temperature, height and illumination were the most significantly related factors shaping the fungal communities. Humidity showed the highest degree of variance description (19.2%) than all other environmental factors, followed by illumination (18.3%) and height (12.8%). Furthermore, fungal richness and diversity indices showed a positive correlation with humidity ( p  < 0.05). These results help in understanding the fungal community in tombs, promoting the mitigation of deterioration phenomena of such building heritage for the present and future.

Humidity governs the wall-inhabiting fungal community composition in a 1600-year tomb of Emperor Yang