Cologne Cathedral took over six centuries because builders stopped for 369 years
Work on Cologne Cathedral began in 1248, halted in 1473 and only restarted in 1842. Church buildings carry long stories like that. The oldest one archaeologists have identified was an ordinary house in Syria, and medieval churches doubled as banquet halls, theatres and even grain barns.
The earliest archaeologically confirmed church is the house church at Dura-Europos, founded sometime between 233 and 256 AD. Purpose-built worship halls followed in the later third century, many of them destroyed during the Diocletianic Persecution early in the next, before far grander buildings rose under Constantine. The English word itself travelled a long road: Old English cirice came from a Germanic form, probably borrowed through Gothic from the Greek phrase for the Lord's house.
Between the 11th and 14th centuries Western Europe saw a boom in cathedral and parish church building. These were community hubs as much as sacred spaces, hosting guild meetings, feasts, mystery plays and fairs, while their grounds were used to thresh and store grain. Romanesque churches, popular from about 1000 to 1200, were massive and compact, with round arches and sturdy towers. Gothic design, which emerged around 1140 in the Île-de-France, introduced pointed arches, rib vaults and buttresses, which let walls thin out and windows grow. Ambitious builders sometimes overreached, and several towers collapsed.
Layout carries meaning. A traditional plan forms a cross, the nave as the upright and the altar area as the crossbar, while circular plans suggest eternity and domes draw the eye heavenward. Many altars face east, or more precisely towards sunrise, a custom that began in fourth-century Byzantium and spread west in the eighth and ninth centuries. Protestant congregations favoured interiors that aimed every sightline at the pulpit, and Baroque churches from about 1575 treated the whole building as one unified work of art, often to display wealth and power.
Names are often misunderstood. A cathedral is defined not by size but by housing a bishop's throne, the cathedra, so some are tiny, such as Christ Church Cathedral in Oxford or Porvoo Cathedral in Finland. Basilica began as the name for a Roman public building in the forum and now also means a church granted special ceremonial rights by the pope.
Source: Church (building)
