Table 3.

The most abundant sequences (>2%) assigned to microorganisms at the genera level and cumulatively assigned to uncultured, unclassified, unidentified or unspecified categories.

Sample		April	June	August	October
Sand-like/dust samples from ancient walls	Bacteria	Bacillus (20.2%) Pseudomonas (5.6%) Virgibacillus (3.2%) Crossiella (3.1%) Paenisporosarcina (3.1%) Truepera (2.7%) Arthrobacter (2.7%) Genera uncultured or unspecified (41.8%)	Bacillus (19.7%) Crossiella (9.8%) Amycolatopsis (5.5%) Paenisporosarcina (3.4%) Pseudomonas (3.3%) Streptomyces (3.2%) Virgibacillus (3.1%) Prauserella (2.9%) Arthrobacter (2.9%) Paenibacillus (2.1%) Planococcus (2.1%) Genera uncultured or unspecified (23.7%)	Bacillus (14.9%) Paenisporosarcina (14.0%) Crossiella (9.6%) Mesorhizobium (5.4%) Amycolatopsis (4.3%) Virgibacillus (4.0%) Prauserella (3.9%) Streptomyces (3.0%) Saccharopolyspora (2.2%) Genera uncultured or unspecified (15.6%)	Crossiella (14.5%) Amycolatopsis (10.9%) Bacillus (10.3%) Prauserella (5.2%) Acinetobacter (5.1%) Paenisporosarcina (3.1%) Genera uncultured or unspecified (27.3%)
	Fungi	Aspergillus (8.8%) Genera unidentified or unspecified (67.3%)	Aspergillus (20.7%) Penicillium (7.0%) Phialosimplex (2.7%) Debaryomyces (2.5%) Genera unidentified or unspecified (44.3%)	Aspergillus (12.1%) Alternaria (2.6%) Genera unidentified or unspecified (62.9%)	Aspergillus (10.3%) Phialosimplex (4.3%) Leucosporidium (3.4%) Acremonium (2.1%) Genera unidentified or unspecified (56.5%)
Air sampled onto agar plates	Bacteria	Bacillus (28.4%) Psychrobacter (19.9%) Pseudarthrobacter (16.2%) Micrococcus (14.5%) Arthrobacter (3.7%) Kocuria (3.4%) Staphylococcus (3.3%) Paracoccus (2.2%) Genera uncultured or unspecified (0.8%)	Bacillus (21.4%) Staphylococcus (19.4%) Enhydrobacter (10.9%) Acinetobacter (10.6%) Micrococcus (7.7%) Kocuria (5.5%) Genera uncultured or unspecified (23.2%)	Bacillus (37.3%) Micrococcus (20.1%) Staphylococcus (18.5%) Acinetobacter (8.2%) Exiguobacterium (5.7%) Massilia (5.3%) Genera uncultured or unspecified (0.2%)	Pseudomonas (16.8%) Corynebacterium 1 (13.8%) Micrococcus (12.2%) Acinetobacter (10.7%) Bacillus (8.4%) Lysinibacillus (5.8%) Staphylococcus (4.8%) Enterococcus (4.8%) Kocuria (2.5%) Microvirga (2.2%) Massilia (2.0%) Genera uncultured or unspecified (10.8%)
	Fungi	Penicillium (41.9%) Beauveria (25.5%) Cladosporium (6.4%) Circinella (7.1%) Aspergillus (6.9%) Coprinellus (4.3%) Talaromyces (2.1%) Genera unidentified or unspecified (3.0%)	Penicillium (22.1%) Cladosporium (15.8%) Porostereum (11.8%) Talaromyces (6.1%) Aspergillus (5.3%) Bjerkandera (5.9%) Botrytis (4.5%) Paraconiothyrium (3.1%) Agrocybe (2.8%) Genera unidentified or unspecified (12.7%)	Penicillium (20.6%) Coprinellus (15.6%) Talaromyces (13.5%) Cladosporium (11.0%) Porostereum (10.5%) Coriolopsis (9.8%) Aspergillus (6.9%) Trametes (5.9%) Bjerkandera (2.7%) Alternaria (2.0%) Genera unidentified or unspecified (0.8%)	Trichoderma (43.7%) Penicillium (26.8%) Cladosporium (18.8%) Talaromyces (8.0%) Genera unidentified or unspecified (2.7%)