The structure and the spatio-temporal dynamics of the mixed beech-silver fir-Norway spruce old-growth forest of Biogradska Gora (Montenegro) have been analysed at different spatial scales: at the landscape scale, using a high resolution SPOT5 satellite image and at the stand level with an intensive field survey. This remote sensing approach has been used to obtain a land cover map in order to define the main vegetation types and to detect the large canopy gaps (> 150 m2). The structural characteristics have been delineated in a 50 ha study area in which a regular 120 m grid was superimposed over a 1:10000 raster map and 30 sampling points have been obtained. The forest is characterized by a high volume of living trees (1029.6 m3ha-1) and coarse woody debris (420.4 m3ha-1) and by small-scale disturbances (individual trees to small groups) with a low incidence of intermediate disturbances (18 forest canopy gaps > 150 m2 over 1230 ha). The two approaches have proved useful to delineate the spatio-temporal dynamics. The Biogradska Gora forest dynamics are dominated by very small-scale processes, which are partially autogenic and partially caused by allogenic factors. The influence of large scale or intermediate disturbances has shown to be negligible.