The cathedral’s apparent anarchy of shapes hides a comprehensible plan of nine main chapels. The tall, tent-roofed tower in the centre houses the namesake Church of the Protecting Veil of the Mother of God. The four biggest domes top four octagonal-towered chapels: the Church of Sts Cyprian & Justina, Church of the Holy Trinity, Church of the Icon of St Nicholas the Miracle Worker, and the Church of the Entry of the Lord into Jerusalem. Finally, there are four smaller chapels in between. Each chapel was consecrated in honour of an event or battle in the struggle against Kazan.