Buildings with public access, such as hospitals, schools, churches, cinemas, government buildings, shopping complexes and other places of public resort.
Ancient town walls and similar structures which are not derelict. Frequently with pteridophytes. Other possible species include: Parietaria judaica, Mercurialis annua, Hyoscyamus albus, Verbascum undulatum, Capparis spinosa ssp. spinosa, Micromeria juliana, Diplotaxis tenuifolia, Sedum album, Lactuca serriola, Asphodelus fistulosus, Bromus madritensis, Erysimum cheiri, Antirrhinum majus, Sonchus oleraceus.