The church is from the fourth century and embraces three sanctuaries.
The main sanctuary is dedicated to Saint Bishoy, and is connected with the Khurus through a high portal with ornate wooden panels dating to the Fatimid Period.
The north Sanctuary is dedicated to the Holy Virgin Mary.
The southern sanctuary is dedicated to John the Baptist, it has some ancient painting on the eastern wall.
The feretory for the body of Saint Bishoy and the relics of Saint Paul of Tammah are situated in the north eastern corner of the khurus, while those for the body of Pope Benjamin II is in the south western corner of the nave.
The nave has a precious wooden pulpit which is dated to the sixth century, it was used by a spiritual father to preach his disciples, or a priest to teach the people the Christian faith. The pulpit is made of wood, and it has a square area 2×2 m2, the pulpit balustrade is 1.5m from the church floor, it is fixed by a wooden column and rests on a wall that separates the first and the second khurus.