Looks like the Sloan Great Wall is the biggest: http://en.wikipedia.org/wiki/Sloan_Great_Wall http://en.wikipedia.org/wiki/Sloan_Great_Wall "it is the largest

Looks like the Sloan Great Wall is the biggest: http://en.wikipedia.org/wiki/Sloan_Great_Wall http://en.wikipedia.org/wiki/Sloan_Great_Wall "it is the largest known structure in the universe"