What's the price you pay for timelessness? About $1.2 billion. That's what the gleaming Diller Scofidio + Renfro renovation to Lincoln Center -- striking glass awnings, a spectacular vivisection of Alice Tully Hall, and an enhanced central plaza and fountain -- cost back in 2010. Yet with New York City Fashion Week back on campus February 9-16, we'll just call it priceless. Here's what to do during your time at the tents.