Barrel Vaults for Kids
Once you have made an arch, you know how to make a doorway or a window without having to use big expensive beams. But how do you make the whole roof that way?
Roman baths of Cluny in Paris
Easy: you stick a whole lot of arches together in a row, and that makes a roof. That's a barrel vault: an arch over and over. (This one is in the Roman baths at Cluny in Paris).
They're called barrel vaults because they look like the inside of a barrel.
Arch of Sapor (Iraq, 200 AD)
In the Middle Ages, architects also used barrel vaults to put stone roofs on Romanesque churches and cathedrals. By the late 1100s AD, however, most architects were using a more complicated kind of stone roof called a groin vault.
To find out more about barrel vaults, check out these books from Amazon.com or from your library:
Arches to Zigzags: An Architecture ABC, by Michael J. Crosbie (2000). Shows what an arch is, or a gable, or an eave. For younger kids.
Eyewitness: Building, by Philip Wilkinson, Dave King, and Geoff Dann (2000). Lavishly illustrated, like other Eyewitness books for kids, and with good explanations of most architectural terms.
Cathedral: The Story of Its Construction, by David Macaulay (1981). Beautiful drawings and clear text explain exactly how medieval craftsmen built a groined vault. For kids.