Full exterior view of Union Mutual Life Insurance Company, 400 Congress Street, from north. The west half of the building was built in 1956. Union Mutual began construction on their subsequent headquarters at 2211 Congress Street, in 1974. Photo published in the Portland Press Herald, on 29 June 1968.https://digitalcommons.portlandlibrary.com/pphnegs_images_business/1218/thumbnail.jp