[3] describes a multidisciplinary study on the state of conservation of white marbles from the Florence Cathedral and the microbial community involved in their deterioration. This remarkable study is focused on the widespread dark discoloration of marble analyzed in two differently exposed sites of the Cathedral: NW and SE. The authors used chemical and petrographic analyses, in situ and ex situ microscopy, and cultivation and identification of microorganisms. According to the obtained data the darkening is mainly due to the growth of black fungi and dark cyanobacteria at both the study sites. The biodiversity of the lithobiontic community seems to be similar in the investigated areas, especially that of the photoautotrophic components. On the contrary, the pattern of microbial colonization on/inside marble seems to be different at the NW and SE sites depending on the distinct climatic conditions of the two study areas, in particular on solar radiation exposure, which influences marble's bioreeptivity. This work presents the first report on the lithobionic community inhabiting the Florence Cathedral marbles. These results are very important for future interventions to control microbial growth. In the Roman wall of Lugo (NW Spain), declared a World Heritage site by UNESCO in 2000, three separate treatments were applied, in the past 20 years. In this interesting work, [PERSON] et al. [4] used a combined laboratory and field research to examine the possible alterations caused by herbicide treatments applied to the construction materials of the Roman Wall (schist and some granite, bound with mortar). Their results showed that herbicidal treatments should focus on environmentally friendly technologies with low risk to human health and should not damage the construction materials. In this respect, _Origanum vulgare_ L. and _Thymus vulgaris_ L. essential oils seem to be the appropriate, as they did not provoke any mineralogical alterations or changes in the salt content and original colour. Nanhai No. 1, a Chinese Song Dynasty shipwck, was discovered in 1987 near the Chuanshan archipelago in the South China Sea, Guangdong Province. In 2007, Nanhai No. 1 was salvaged and displayed in \"the Crystal Palace\" of the Guangdong Maritime Silk Road Museum. Due to the high humidity and high temperature in the storage environment of Nanhai No. 1, and the fact that wooden cultural relics are natural organic matter, this provides suitable conditions for the growth and reproduction of microorganisms. Microorganisms are very harmful to wooden relics. Some bacteria and fungi can destroy wood by degrading cellulose, hemicellulose and lignin. In this fascinating paper by [PERSON] et al. [5], the authors report the inhibitory effect of cinnamaldehyde on the main destructive microorganisms of Nanhai No. 1 Shipwreck. The results showed the inhibitory effects of cinnamaldehyde, a natural biocide that proved to be effective as a control agent for many of the main destructive microorganisms identified in the Nanhai No. 1 Shipwreck. This is an important step towards the development of safer products - both for the environment and the safety of the professionals responsible for the application of such products. In this newsworthy work from [PERSON], [PERSON] and [PERSON] [6] the granite biodiversity is analysed. The microorganisms' diversity present in historical rural granite buildings was identified for the first time. This granite has been used throughout history in Galicia (NW Spain), forming the basis of much of the region's architecture. For the identification of the granite biofilms the authors used a combination of culture-dependent and next generation sequencing (NGS) techniques. For this work three granite-built churches locatedin rural areas of Galicia, in the northwestern part of the Iberian Peninsula, were selected.