The R.R Donnelley Printing Plant, sometimes known as the Lakeside Press Building or more simply The Calumet Plant and now known as the Lakeside Technology Center, was built between 1912 and 1929 to house the operations of the RR Donnelley printing company. The building supported printing operations for the company and was the Donnelley headquarters until 1991 when they moved the headquarters to 77 West Wacker. In 1993, the plant was closed after the discontinuation by Sears, Roebuck and Co. of its mail-order catalog, which had been the last major account printed there. In 1999 the building was retrofitted and is currently owned by Digital Realty Trust operating as a carrier hotel or data center. The newly outfitted building was the first and largest planned carrier hotel in the United States.