Circular churches

  

Most cathedrals and great churches have a cruciform groundplan. In churches of Western European tradition, the plan is usually longitudinal, in the form of the so-called Latin Cross with a long nave crossed by a transept. The transept may be as strongly projecting as at York Minster or not project beyond the aisles as at Amiens Cathedral.

Many of the earliest churches of Byzantium have a longitudinal plan. At Hagia Sophia, Istanbul, there is a central dome, frame on one axis by two high semi-domes and on the other by low rectangular transept arms, the overall plan being square. This large church was to influence the building of many later churches, even into the 21st century. A square plan in which the nave, chancel and transept arms are of equal length forming a Greek cross, the crossing generally surmounted by a dome became the common form in the Orthodox Church, with many churches throughout Eastern Europe and Russia being built in this way. Churches of the Greek Cross form often have a narthex or vestibule which stretches across the front of the church. This type of plan was also to later play a part in the development of church architecture in Western Europe, most notably in Bramante's plan for St. Peter's Basilica.

Axis

The majority of cathedrals and great churches are cruciform in shape with the church having a defined axis. The axis is generally east/west with external emphasis upon the west front, normally the main entrance, and internal emphasis upon the eastern end so that the congregation faces the direction of the coming of Christ. Because it is also the direction of the rising sun, the architectural features of the east end often focus on enhancing interior illumination by the sun. Not every church or cathedral maintains a strict east/west axis, but even in those that do not, the terms East End and West Front are used.Many churches of Rome, notably St Peter's Basilica, face the opposite direction.

The Byzantine Church of the Holy Apostles, Athens, shows a Greek Cross plan with central dome and the axis marked by the narthex (transverse vestibule).

Pisa Cathedral from the "Leaning Tower" shows the Latin Cross form, with projecting apse, foreground and free-standing baptistry at the west.

Southwark Cathedral, London, shows strongly projecting transepts and the central tower common in Britain.

 

Nave

The majority of cathedrals and large churches of the Western European tradition have a high wide nave with a lower aisle separated by an arcade on either side. Occasionally the aisles are as high as the nave, forming a hall church. Many cathedrals have two aisles on either side. Notre Dame de Paris has two aisles and a row of chapels.

In the case of a centrally planned church, the major axis is that between the main door and the altar.

Transept

The transept forms the arms of the church building. In English cathedrals of monastic foundation there are often two transepts. The intersection where the nave and transept meet is called the crossing and is often surmounted by a small spire called a flиche, a dome or, particularly in England, a large tower with or without a spire.