First National Bank Building / 100 Federal Street
Boston knows this 1970 job by a much less formal name: the 'Pregnant Building.'

The First National Bank Building at 100 Federal Street in Boston, Massachusetts. Also known as the "Pregnant Building" due to its. Photographed in 2014; a current view, not a construction-period photograph.
Current view · 2014 · Photo: Tim Pierce · CC BY-SA 3.0 · Source
Why this project matters
- Project identity
- Verified
- Kelly connection
- Family source
- Masonry scope
- Probable
Rita’s list

Transcription: First Bank of Boston — 1970
Recorded by Rita Bartscherer · Bartscherer family record
KM-076
1 of two
“First Bank of Boston — 1970”
100 Federal Street was under construction from 1968 to 1971, exactly spanning Joseph's 1970 entry.
A fun card because Boston gave the building a nickname almost immediately — and Joseph's list places him there while the skyline was changing.
What Kelly did here
Family source
Probable
Likely: most plausibly interior CMU/block at the core, stairs, shafts, service rooms, fire separations and support spaces. Do not attribute the tower's visible dark red granite cladding to Kelly without a stone/masonry trade record; the granite exterior may have been a separate specialty package.
This scope is recorded as probable, not documented. It is a disciplined reading of the building and the trade practice of the period, not a contract-level record of Kelly’s work.
The construction team
- 01Architect
Campbell, Aldrich & Nulty
What happened to it
Still standing
Sources
2 citedOpen →
- 01
- 02boston.com
then and now building bostons skyline
- Tim Pierce · CC BY-SA 3.0 · Wikimedia Commons · 2014-03-06
The First National Bank Building at 100 Federal Street in Boston, Massachusetts. Also known as the "Pregnant Building" due to its. Photographed in 2014; a current view, not a construction-period photograph.
Know something about this project?
Share a correction, memory, photograph, source or connection to this project. Every submission is reviewed before anything is published.
Elsewhere in the archive
One Chase Manhattan Plaza (now 28 Liberty Street)
Family list: “Chase Manhattan Bank”
Manhattan, New York
4 New York Plaza / Manufacturers Hanover Operations Center (now SoMA at 25 Water Street)
Family list: “Manufacturers Hanover Bldg.”
Manhattan, New York
Swiss Bank Tower / 623 Fifth Avenue
Family list: “Swiss Bank - 49-50 Streets”
Manhattan, New York