Carlos Mazariegos's video: The Chicago Spire

The Chicago Spire is an under construction skyscraper in the U.S. city of Chicago, Illinois. Construction work began in 2007 but was put on hold in 2008 before any of the superstructure had been built. The building was designed by Spanish architect Santiago Calatrava and is being developed by Garrett Kelleher of Shelbourne Development Group, Inc.[4][5][8] If completed, at 2,000 feet (610 m) and with 150 floors, it will be among the world's tallest buildings and freestanding structures. Originally announced in May 2005 by Christopher T. Carley of the Fordham Company, the project was supported by many Chicagoans and city officials.[9][10][11] After several months of development, Carley failed to acquire necessary financing and the project was taken over by Garrett Kelleher of the Shelbourne Development Group. Since that time, three major revisions were made to the design. Construction of the Chicago Spire has stopped and will not resume until the markets improve from the subprime mortgage crisis. On October 8, 2008, Santiago Calatrava filed a lien on the project stating that the developer has yet to pay him the $11.34 million owed for his work, casting some doubt over the future of the project