Molecular monitoring of the microbial dynamics occurring on historical limestone buildings during and after the in situ application of different bio-consolidation treatments

► Two historical buildings received two different in situ bioconsolidation treatments. ► The microbial communities were monitored with molecular techniques. ► Similar dynamics occurred on the buildings during a short- and long-time monitoring. ► The primordial heterogeneous micro-biota was changed by the treatments. ► A homogenous micro-biota of carbonatogenic bacteria was established (mainly Firmicutes).