In this final-year thesis, an analysis of the bearing capacity of a reinforced concrete dome with an edge ring beam with a diameter of 26,6 meters was made. The dome was built in 1932 in Buzet as part of the Istrian water supply system and is still in operation today. The construction process of the dome has been described and documented in detail with archival photographs. Three different numerical models were made. In all models, the shell is modelled with plate finite elements, while the models differ in the way the tensile ring is modelled. In Model 1 and Model 2, the tensile ring is modelled with beam finite elements, and the models differ in the way the dome and the ring are connected. In Model 3, the ring is modelled with spatial finite elements. The results were compared with the manual calculation according to the membrane theory for shells taking into account the influence of the boundary conditions (existence of the edge ring beam), which were obtained from the compatibility conditions of the deformations of the dome and the edge ring. Structural bearing capacity verification was carried out for vertical actions in the persistent design situation.