About AmSouth Center
The Regions Center (formerly the AmSouth Center, before that the AmSouth-Sonat Tower, and originally the First National-Southern Natural Building) is a 119 meter (390 foot) tall, 30 story office tower located at northwest corner of 20th Street and 5th Avenue North in Birmingham, Alabama, USA. It served as the corporate headquarters for AmSouth Bancorporation from 1972 until 2006 and Sonat, Inc. and its subsidiaries from 1972 until 2007 when it relocated to the Colonial Brookwood Center. The building now serves as the corporate headquarters for Regions Financial Corporation. Completed in 1972, the modernist-style skyscraper was designed by Welton Becket & Associates of Houston with Charles H. McCauley Associates serving as the local associated firm. Built as a partnership between First National Bank and Southern Natural Gas Corporation, its original names was the First National-Southern Natural Building. First National changed its name to AmSouth Bancorporation later in 1972, with Southern Natural Gas changing its name to Sonat, Inc. in the early 1980s, and the building was then given its most familiar name the AmSouth-Sonat Tower.