What makes a church a cathedral
A cathedral is not defined by size or style. It is the church that holds the cathedra, the bishop’s seat, which makes it the main church of a diocese. Some cathedrals were modest buildings, and plenty of large abbey and parish churches were bigger than the cathedrals of small dioceses. The great medieval cathedrals we remember are the ones where a wealthy bishopric, a prosperous town, or both, decided to build on an extraordinary scale.
Most of the famous examples were built or rebuilt between roughly the eleventh and the fifteenth centuries. Many replaced earlier churches that had burned, grown too small, or simply seemed out of date. Notre-Dame in Paris, Chartres, Reims and Amiens in France, Canterbury and Salisbury in England, Cologne in Germany, Burgos and Seville in Spain, and Siena and Milan in Italy all belong to this story, though they differ a great deal from one another.
Why so many were built
The reasons overlapped, and historians weigh them differently.
- Worship. A cathedral was the setting for the main liturgy of the diocese, with space for a large community of clergy, many altars, and processions.
- Relics and pilgrimage. Churches that held a saint’s remains drew visitors, and visitors brought offerings. The shrine at Canterbury is the best-known English example, built around the holy relics of a martyred archbishop. A church on a major route for medieval pilgrims had a strong incentive to rebuild bigger.
- Prestige. A bishop, a king or a city council could show its standing through stone. Rivalry between neighboring towns probably encouraged taller, grander buildings, though it is hard to measure.
- Piety and fear. Gifts to the church were believed to help the giver’s soul. Many donors, rich and poor, wanted to be part of something sacred and lasting.
Who paid
There was no single source of money. A cathedral was usually funded by a patchwork of income streams, and the mix varied by place and decade.
The bishop and the cathedral chapter, the body of clergy attached to the church, set aside part of their revenues, and church wealth built up from estates, rents and fees was a major base. Income from the church tithe, a tenth of produce owed to the church, supported the clergy generally, though how much of it reached any particular building project varied. Kings and nobles gave land, cash, timber or lead, and sometimes took a direct interest in the project. Pilgrims’ offerings could be substantial at shrine churches. Fundraising campaigns also existed: relics were sometimes carried around the region to raise gifts, and indulgences, which granted spiritual benefits for donations, were sometimes attached to building funds.
Townspeople contributed too. Merchants, and in some places the craft guilds, paid for chapels, windows or sections of the building, and a guild’s trade is often shown in the glass it donated. In some cities the town government and the bishop were rivals, so a cathedral could be a point of civic pride and a source of friction at the same time.
How long they took
Cathedrals were built in stages, so the time they took varied enormously.
Chartres is the standard example of speed. After a major fire in 1194, the main body of the new cathedral rose in a few decades, which is why it looks so unified. Salisbury was also built comparatively quickly in the thirteenth century on a new site, though its tall spire came later. At the other extreme, Cologne was begun in the thirteenth century and not finished until the nineteenth century, using the surviving medieval plans. Many others were never completed as planned. Towers were left unfinished or stopped at a single stage, and some designs were simply too ambitious for the money available.
The reasons for delay were practical. Funds ran out or arrived irregularly. Wars interrupted work. The Black Death in the mid-fourteenth century reduced the workforce and disrupted funding in many places, and the Hundred Years War affected building in parts of France and England. Building was also seasonal, since mortar and stonework were difficult in winter, so the work typically moved ahead in summer campaigns.
Who actually built them
A cathedral site was a large workplace. The medieval stonemasons cut and set the stone and often designed the work; a master mason held the overall responsibility, supported by carpenters, glaziers, blacksmiths, plumbers who worked lead, carters, quarry workers and laborers. Tools, cranes powered by treadmills, wooden scaffolds and temporary frames for arches were the standard equipment, and the surviving structures show what skilled medieval engineering could achieve without modern machinery. Workshops attached to a cathedral, often called lodges, kept tools, templates and drawings and sheltered the masons.
The idea that thousands of unpaid volunteers dragged carts of stone on pious impulse comes from a few vivid accounts and has been much exaggerated. Most work was done by paid specialists, with occasional bursts of voluntary labor reported in sources of the period.
What they meant to a town
For people in a town, the cathedral was more than a church. It was usually the tallest structure for miles. Bells rang the hours and called people to services and alarms. The building sheltered crowds on feast days, hosted markets and meetings in its precincts, and gave work to hundreds of households for years. Its presence also shaped how medieval towns grew, with streets, markets and inns clustering around the cathedral close.
Inside, its sculpture, glass and ceremonies taught and reminded people of Christian belief. The building was meant to suggest heaven on earth to those who entered it, and some cathedrals also served as places of civic ceremony, coronation or burial for kings and bishops.
Different regions, different cathedrals
It is easy to picture a single “cathedral style,” but regional traditions differed. French cathedrals tend to emphasize height and large windows. English ones are often longer and lower, with a distinctive east end and large cloister and chapter-house complexes. German cathedrals include imposing west towers, and the Holy Roman Empire had its own earlier traditions of large Romanesque churches. Italian cathedrals often kept a lower profile and used colored marble and a mix of earlier traditions. In Spain, some cathedrals were built on or near the sites of former mosques after Christian conquests, and Islamic craftsmanship left a mark on local decoration.
A note on the evidence
Records for many cathedral projects are incomplete. Building accounts survive for some and not others, dates of construction campaigns are often debated, and later restorations have altered the buildings considerably. When a source gives an exact figure for cost, workforce or the number of years taken, it is worth treating it cautiously unless the original records are well documented. What is clear is the overall pattern: these were collective projects, paid for by many hands over long periods, and they changed the skyline and the economy of the places that built them.