The nave is the main body of the religious building, intended for the assembly of the faithful. Already used in ancient times, both by the Greeks and the Romans, the nave in Romanesque and Gothic churches symbolically recalls the path that the faithful take to reach the altar. The nave also refers to Peter’s ship that welcomes and guides the “people of God”, which is why it is covered by , a roof that is sometimes keeled, in the shape of an overturned boat.