In this diploma thesis we estimated the stand structure of the old-growth forest reserve Krakovo in the year 2016. The surface area of the reserve is 39,84 hectares. 16 sampling points were set up and the density of the sampling network of 100 % 250 metres was used. We concluded a sampling measurement and analysed the publicly accessible lidar data. In the old-growth forest reserve there are on average 388 trees per hectare. The average basal area in the reserve is 44,5 % 9,9 m2/ha, the average growing stock is 731,6 % 190,2 m3/ha. The most common tree species being pendunculate oak and hornbeam. The average growing stock of decayed trees is 196,3 m3/ha with pendunculate oak being the most common constituent. Approximately the same share of the evaluated trees has medium long and short-crowns. Most of the evaluated trees are moderately vital with a declining tendency.