AT&T Michigan Headquarters
headquarters of American company AT&T in Detroit, USA
The AT&T Michigan Headquarters is a building complex located at 1st Street, Cass Avenue, State Street, and Michigan Avenue in Downtown Detroit, Michigan. It contains the AT&T Building, the AT&T Building addition, the Maintenance Shop and is owned by communications giant AT&T.
Architecture
The AT&T Building (formerly known as the SBC Building, the Ameritech Building and the Michigan Bell Building) was completed for the Michigan Bell Telephone Company in 1919 and expanded in 1928. It is located at 1365 Cass Avenue, and occupies the block bordered by First Street, Cass Avenue, State Street, and Michigan Avenue. The AT&T Building stands 19 stories tall. The original 7-story structure completed in 1919 was designed to accommodate additional floors as needed. Construction of the 12-story addition began in June 1927, and was completed in September 1928. Several horizontal bands of limestone mark the top of the original structure.
The high-rise building is used as the Michigan headquarters for communications giant AT&T. It is designed in the Art Deco and Art moderne architectural styles, using tan brick and limestone for the façade. Windows are grouped in twos divided by brick piers and have bronze spandrel panels below depicting lightning bolts, bells and other symbols related to communication. Windows on floors 17 through 19 are recessed and framed by large arches.
The public source identifies “AT&T Michigan Headquarters” as headquarters of American company AT&T in Detroit, USA. This brief keeps that definition visible, then builds a research path around Michigan, Headquarters and headquarters.
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Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Mar 31, 2026. The linked authority identifier is Q4654541. Authority coordinates are 42.333, -83.054. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1919, 1928, 1365 and 1927.
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This entry incorporates text from “AT&T Michigan Headquarters” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.