Laborers work on the 1915 addition to the Federal Building on July 1, 1915.

Photo from the Burton Historical Collection, Detroit Public Library

The columns inside the 1897 Federal Building are resheathed as part of the 1915 addition to the building.

Photo from the Burton Historical Collection, Detroit Public Library

The 1915 addition also saw changes made to the original 1897 part of the Federal Building.

Photo from the Burton Historical Collection, Detroit Public Library

Plaster corbels lie on the floor in 1915 during work on the Federal Building. They likely went up on either side of the archway at center in the photo.

Photo from the Burton Historical Collection, Detroit Public Library

Work wraps up on the loading dock for mail that was added in 1915. Photo taken Nov. 1, 1915.

Photo from the Burton Historical Collection, Detroit Public Library