Inside the composite church is a labyrinth of narrow vaulted corridors and vertical cylinders of the churches. Today the cathedral consists of nine individual chapels. The largest, central one, the Church of the Intercession, is tall internally but has a floor area of only . Nevertheless, it is wider and airier than the church in Kolomenskoye with its exceptionally thick walls. The corridors functioned as internal parvises; the western corridor, adorned with a unique flat caissoned ceiling, doubled as the narthex.