An arched roof built of bricks or stone is called a vault. In the Romanesque period before the Gothic, some churches had vaulted roofs. They were always based on perfectly semi-circular shapes. There were two main ways to make a nave vault in the Romanesque period. A vault could be long like a tunnel. Churches with this type of vault were always rather dark. Or it could be square, like two tunnels crossing each other. This meant that the columns that carried the vault always had to be placed on a perfectly square ground plan, which was not always possible.
One of the good things about pointed arches was that they could be narrow and tall, or flattened and wide. Using pointed arches, architects could make vaults of very different shapes. They did not even have to be rectangular. A Gothic architect could make a vault with one side narrow, two sides wide and the last side even wider. They could make a vault with three sides or five sides quite easily, by using pointed arches.
The vaults were made of ribs which met each other at the highest part of the vault. In between the ribs were sloping surfaces of stone or brick that could be much thinner and lighter than the ribs. At first the pattern made by the ribs was quite plain, like Romanesque vaults, but architects, particularly in England, soon started adding small ribs in between the main ones and making different patterns. Some vaults like this can also be seen in Spain and Germany, but not usually in France or Italy.
In the Gothic period the shape and style of pointed arches changed. But the changes were not the same in every country.
With pointed arches, windows could be made very large. Architects made many designs of pointed arches crossing each other in different ways. These designs were often used in windows, which look as if they are filled with beautiful stone lace. This is called "tracery". The stone tracery was used to hold the glass in place. An Architectural Historian can often tell just how old a part of a building is by looking at the window tracery design.
The simplest Gothic arch is a long opening with a pointed arch known in England as the lancet. A "lancet" is a sharp knife, so these windows are knife-shaped. Very often lancet windows are put together in a group of three or five.
Salisbury Cathedral is famous for the beauty of its Lancet Gothic Architecture. In England the style is called "Early English Gothic". York Cathedral in England has a group of five lancet windows that are 50 feet high and are still full of ancient glass. They are called the Five Sisters.
These simple windows are also found at Chartres Cathedral and Laon Cathedral in France. They are the most usual sort of Gothic windows in Italy.
Many Gothic openings have tops that are based upon an equilateral triangle. The Equilateral Arch has a very pleasing look and gives a wide opening useful for doorways, arcades and big windows.
These arches are often filled with tracery in circular designs. In England this style is called Geometric Decorated Gothic. It can be seen at many English and French Cathedrals, for example Lincoln cathedral in England and Notre Dame in Paris.
Some Gothic windows have designs in the tracery, or even in the top of the window itself, that rises up like a flame. This is called Flamboyant Gothic. Tracery like this makes a very rich and lively effect.
Some of the most beautiful and famous windows of Europe have this type of tracery. It can be seen at St Stephen's Vienna, Sainte Chapelle in Paris, at the Cathedrals of Limoges and Rouen in France, and at Milan Cathedral in Italy. In England the most famous windows like this are the West Window of York Minster with its design based on the Sacred Heart, the East Window at Carlisle Cathedral and the East window of Selby Abbey. Architectural Historians sometimes argue about which of these is the most beautiful.
Flame-shaped arches are not as strong as ordinary pointed arches. It is never used for making a vaulted roof. If this shape is used to make a doorway, there is generally another stronger arch around it. Another way is to make a square topped door that has Flamboyant decoration over the top. In France there are many doorways, both in churches and in houses, that are like this. They are rare in England but there is one at Rochester Cathedral.
In England the Flamboyant style was used wall arcading and niches. The most famous examples in are in the Lady Chapel at Ely, the Screen at Lincoln and the facade of Exeter Cathedral. In German and Spanish Gothic architecture the Flamboyant style is often used for opnwork stone screens. The famous "pulpit" in Vienna Cathedral is made like this.
The Depressed arch is wide and looks as if it has been pushed almost flat. When arches like this are used to make great big windows they need to be supported by many tall thin vertical shafts and horizontal transoms, so that the window looks as if it has been divided up into a grid (lots of rectangles). This sort of decoration is used on walls as well. In England the style is called Perpendicular Gothic style.
At Gloucester Cathedral the Perpendicular East Window is said to be as large as a tennis court. There are three very famous large chapels in this style- King's College Chapel, Cambridge; St. George's Chapel at Windsor Castle; Henry VII's Chapel at Westminster Abbey. The other famous example is Bath Abbey.
A Gothic cathedral was designed to be like a model of the universe. Everything about the building was designed to tell a message about God.
The statues, the decoration, stained glass windows and wall paintings told Bible stories such as how God created the world and how he rules over everything that is in the universe, the seasons of the year and the stars in the sky.
Carvings near the door often show the signs of the Zodiac because the patterns of stars in the sky were very important to farming people who did not have calendars to tell them when to plant and when to harvest.
Above the main door is often a sculpture of Jesus on a throne, judging the people of the Earth. Many pictures and sculptures are there to remind people to live good lives because they never know what will happen next.
Many churches were very richly decorated, both inside and out. the statues were often painted in bright colours but nowadays only tiny bits remain at Chartres cathedral and some other places. Wooden ceilings were usually brightly coloured. Sometimes the stone columns were painted as well.
Even though some things about Gothic architecture stay the same, other things look different in different countries.
Different building materials were found in different parts of Europe. This is one of the differences in the architecture between different places.
In France, there was limestone. It was good for building because it was soft to cut, but got much harder when the air and rain got on it. It was usually a pale grey colour. France also had beautiful white limestone from Caen which was perfect for making very fine carvings.
England had coarse limestone, red sandstone and dark green Purbeck marble which was often used for architectural decorations like thin columns.
In Northern Germany, Netherlands, Denmark, Baltic countries and northern Poland there was no good building stone, but there was clay for making bricks and tiles. So many of these countries have Brick Gothic churches and even Brick Gothic castles.
In Italy, limestone was used for city walls and castles, but brick was used for other buildings. Because Italy had lots of beautiful marble in many different colours, many buildings have fronts or "facades" decorated in coloured marble. Some churches have very rough brick "facades" because the marble was never put on. Florence Cathedral, for example, did not get its marble "facade" until the 1800s.