S y n o p s i s : The first study of aerophytic cryptogams from granite monuments investigated in the Bulgarian town Koprivshtitsa (Sredna Gora Mountains – 1058 m a.s.l.) compared with two identical bronze and limestone copies in the capital town Sofia (650 m a.s.l.) is presented. Greenish layers on the surface of one of the Koprivshtitsa monuments consisted of the aerophytic green alga Apatococcus lobatus together with free-living and lichenized green alga Trebouxia arboricola and the aerophytic green alga Coccomyxa sp. Some lichens as Lepraria cf. neglecta and Candelariella vitellina were also found. The same lichens together with further species like Protoparmeliopsis muralis var. muralis and Caloplaca sp. were detected on the surrounding stonework of the second Koprivshtitsa monument. On the surface of the calcareous statue in Sofia only some initial stages of Apatococcus lobatus were registered. The algal taxa have been studied in cultures and some comments on their taxonomy and distribution are given.