Biodeterioration of marble by micromycetes was investigated on the marble samples from Chersonessus (Crimea). Fungal growth and penetration pattern were observed by means of dissecting and scanning electron microscopy of the original marble samples. Species composition of fungi inhabiting rock surface is given. Typical soil fungi and specific rock inhabitants («black yeasts») are described. Morphological properties of the isolates in culture are discussed. Fungi were evidently influencing and enhancing marble destruction by growth and production of metabolic products. Structure of Chersonessus marble with big grains and cracks offers mild microclimatic conditions for fungal growth and development.