Fig. 1.

A. Map of the inner gallery of the Bayon, Angkor Thom, showing locations where biofilm and airborne microorganism samples were collected. Sample names are prefixed by the abbreviation of each biofilm color; sample identifications and biofilm characteristics are given in Table 1. The number next to the tower is the tower number. Blue area shows the area where the roof remained. Orange area shows the area where the roof was partly or completely missing. B. Side view of the inner gallery, which consisted of a sandstone wall on which bas-reliefs were engraved and a roof supported by pillars. Hatched areas show the parts of the pillars or roof that were partly or completely collapsed or missing. The area from which airborne bacterial samples were collected is shown by an asterisk.