While Chiat/Day’s Gehry-designed headquarters were built to symbolize creativity, truly creative spaces often look very different. If you ask the veterans of MIT what a creative space looks like, one building comes to symbolize all that’s best at the university. This building, which was demolished a few years ago, didn’t even have a proper name—it was known only as Building 20—and it could hardly have been more different from the kind of structure that star architects put together.