This remarkable cathedral is hidden behind the façade of an ordinary building of the Catholic seminary. The project's creator proposed the use of architectural solutions from the Messina Cathedral for the interior decoration of the church.

The main altar was adorned with Carrara marble. An image of the "Assumption of the Virgin Mary," a replica of the painting by the Spanish artist B.E. Murillo, which is housed in the Hermitage, was placed in the altar. The side altars featured images of Saint Anthony of Padua and Saint Joseph the Betrothed. A throne under a canopy was placed in the sanctuary. Mosaic decorations, bronze chandeliers, and wall sconces in the shape of crosses all emphasized the cathedral's high status.

The church housed a magnificent organ made by the Friedrich Walcker Factory, which, as bad luck would have it, has been lost.

The cathedral underwent several expansions, which damaged the overall condition of the building. Since 1917, the building began to deteriorate, and it suffered damage during bombings in the war.

In September 1995, the church was returned to the parish. Today, services are held here in Russian, Polish, and Latin. In 2019, a digital computer organ was installed, and concerts are held there.