Chicago’s skyline-defining Willis Tower had reportedly sold to Blackstone Group, a private equity real estate investor, for the blockbuster price of $1.3 billion. That’s a little less than early reports were speculating, but it’s still leaps and bounds above the previous record for a U.S. office tower outside New York City. And the deal includes naming rights. Will it become the Blackstone Tower? Call it what you will—Chicagoans still fondly refer to it as the Sears Tower.