United, O'Hare's number one hub carrier and Chicago hometown airline, operates from Terminal 1. Continental moved from Terminal 2 to Terminal 1 in 2010 as part of its merger with United Airlines. Lufthansa flights depart here from here as well. The new Terminal 1 designed by Helmut Jahn, which was built between 1985 and 1987 on the site of the old international terminal. Terminal 1 has 53 gates spread over 2 concourses: B and midfield C which is connected by an underground tunnel. The tunnel is the most iconic part of ORD with its neon tubing and surreal music and neon installation "Sky's The Limit" designed by Michael Hayden. Even at nearly 25 years of age, Terminal 1 is one of the most modern facilities at ORD. Its design has held up well.