The plan of Gothic cathedrals and churches was usually based on the Latin cross (or "cruciform") plan, taken from the ancient Roman Basilica.,and from the later Romanesque churches. They have a long nave making the body of the church, where the parishioners worshipped; a transverse arm called the transept and, beyond it to the east, the choir, also known as a chancel or presbytery, that was usually reserved for the clergy. The eastern end of the church was rounded in French churches, and was occupied by several radiating chapels, which allowed multiple ceremonies to go on simultaneously. In English churches the eastern end also had chapels, but was usually rectangular. A passage called the ambulatory circled the choir. This allowed parishioners, and especially pilgrims, to walk past the chapels to see the relics displayed there without disturbing other services going on.