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If you have an even number of frames, and an even number of like-sized frames, you can build a grid. You can use as few as four paintings, hanging them in a square pattern. This arrangement is only limited by the amount of wall space you have to work with.[10]
If you had 30 paintings that were one square foot, you could line them in rows of ten, five, or six.
You can work with this arrangement with varied size paintings, but it will work better if you have frames that are all the same size.
A great article. Rectangular grid is i love so much. It is increase the beauty of room