Examples of the buttress, a device from Classical architecture to strengthen a wall and increase its load-bearing capacity. Roman houses, Rome.
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Original image by isawnyu. Uploaded by Mark Cartwright, published on 10 March 2013 under the following license: Creative Commons: Attribution. This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered, in terms of what others can do with your works licensed under Attribution.
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