Even though it's super cold there (and I'm not a fan of the cold), New York City. I love everything about NYC. I love the activity, the buzz, the sites, everything. And since money would not be an issue

I could afford to live in the city I'd live in a nice walk up that is probably 5-10 grand a month (if not more)
If you could go back in time, to any era, when would you go back to? Where and why?