The dimensions of the arches were reduced, optimized, so that the resulting structure could become as light as possible for technological purposes, and at the same time strong enough for the lifespan of the building. The main work was the heavy-assembly-pushing technology in the raising of the main dome. The dome, weighing 4000 tonnes, was lifted by pushing. For the, dome the main gallery, spanning 39,5 m in diameter, which bears the dome and connects to the four bell-towers was prefabricated inside the central square. It sat as a monolith on gravel embankment of 120 cm height. As thus it could be completed in one phase with the supporting gallery, the dome and the cross and copper covering. Works began in November 1988 and assembly was finished at the end of February 1989. The main dome was assembled from 24 curved, reinforced concrete trusses with two layers of decking forming outer skins around either flanges of the trusses. The bottom decking was intended for mosaic ornament on the inner surface of the dome. The electro-hydraulic lifting equipment prescribed by KMG "Trudbenik" was designed and delivered by the Hydraulic and Pneumatic equipment and devices factory "Prva Petoletka". The assembly-lifting of the dome structure, with completely executed copper covering works and cross, weighing from the ground up to the designated position at +40,09 m was done at speeds restricted to 2,5 m/day for safety reasons. With a hydraulic integral lifting power of ca. , proportional serve-valves as well as strike and pressure pickup was done on all four reactive supports simultaneously. Computers led the unity lifting, vertical stepping of 110 mm in one step was realized by application of reinforced concrete slab-cribbing in all reactive supports by robots, which were successively placed under the jacks of the dome. Lifting to 13 m was done with supports passing by the bell-towers in order not to destroy the columns of the galleries. From there, the equipment and support steel (pi shaping) girder were moved into the slits which were left intentionally during the slip-forming of the columns. For each day, casting had to be done in situ around the cribbing slabs in order to finalize 2,5 m of columns per day. The columns were stiff enough for 2,5 m and lifting was restricted to five hours a day. Over 280 electronic elastomers were placed throughout the dome and its elements, all hydraulic components, were