Pi, Harbor Steps

Several years ago, Seattle's Harbor Steps temporarily hosted a giant sculpture of the letter/number pi. I think it was connected to the nearby Seattle Art Museum somehow, but I haven't been able to figure out much of anything else about it: Who created it, what it was officially called, where it went, etc. Anyway, I was going to post this on March 14th (3/14, in the US date format) for Pi Day, but I was on a tough work deadline & totally forgot about Pi Day. So then I figured, hey, I can use it for April Fool's Day instead and say it's because pi actually equals 4. I can't seem to figure out how to make the joke work, though, probably because it's a dumb joke. It's barely a joke at all, to be honest. Besides, "pi equals 4" is a longstanding cheesy internet gag, and there's a nice VIHart video that explains how it works: