Willis Tower to entice the firm to stay. Two years later, Sears began moving its own offices out of the Sears Tower. In 1994, Sears sold the building to Boston-based AEW Capital Management, with financing from MetLife. At the time, it was one-third vacant. By 1995, Sears had completely left the building, moving to a new office campus in Hoffman Estates, Illinois. In 1997, Toronto-based TrizecHahn Corporation (the owner of the CN Tower at the time) purchased the building for $110 million, and assumption of $4 million in liabilities, and a $734 million mortgage. In 2003, Trizec surrendered the building to lender
Willis Tower unfinished World Trade Center to become the world's tallest building. The height was restricted by a limit imposed by the Federal Aviation Administration (FAA) to protect air traffic. The financing of the tower was provided by the Sears company. It was topped with two antennas to permit local television and radio broadcasts. Sears and the City of Chicago approved the design, and the first steel was put in place in April 1971. The structure was completed in May 1973. The construction cost about US$150 million at the time, equivalent to $ million in 2019. By comparison, Taipei 101, built in