The prototype of the three-dimensional architectural solution of the Holy Trinity Cathedral was the Old Russian Vladimir-Novgorod architecture. The main staircase leading to the cathedral, for grandeur is comparable to the Spanish staircase in Rome. The Trinity Cathedral is one of the highest in Russia: the height of the central dome with a cross is 71.2 m.
On the site of the temple there used to be the Dalstroi building - the trust, the disposable use of prisoners' labor. In the late Soviet period, the construction of the nine-storey building of the House of Soviets was started here, a metal frame was erected. But this work was stopped in 1985. Instead of the House of Soviets, it was decided to erect a majestic Orthodox Cathedral - a memorial temple to the victims of Soviet political repression.