It is the cathedral's colourful interior that particularly strikes the eye.^[who?] Mosaics were executed by masters fromVenice. Frescoes were created under the guidance of Professor Adrian Prakhov by a group of famous painters: Wilhelm Kotarbiński, Mikhail Nesterov, Mykola Pymonenko, Pavel Svedomsky, Viktor Vasnetsov, Mikhail Vrubel, Viktor Zamyraylo (1868-1939), and others. The painting of the Holy Mother of God by Vasnetsov in the altar apse of the cathedral impresses by its austere beauty.^{[citation needed]}

The entrance door is adorned with relief bronze sculptures of St. Olga (Princess Olga of Kiev) by sculptor Robert Bakhand St. Vladimir (sculptor H. Zaieman) against a blue background. The iconostasis is carved from the white marblebrought from Carrara. The cathedral was completed in 1882, however, the paintings were fully completed only in 1896.^[1]