Historic wall in Harvard Square has become “a prairie dog village … but with rats.” And there isn’t money to repair it.
A historic wall in Harvard Square may be up against it, as business owners and city officials are banging their heads against the problem of how to fix it.
The stone wall was built more than 200 years ago, mostly hidden behind Charlie’s Beer Garden, was erected in the late 1700s and early 1800s to channel the spring-fed Town Creek to the Charles River. The project made Winthrop Square — then a knoll and the heart of Harvard Square — a more stable and level gathering spot by protecting it from a creek winding toward the Charles River.
The wall might also have been intended for a more ambitious project: a wharf on Eliot Street, said Charles Sullivan, executive director of the Cambridge Historical Commission. Like the West End in Boston, some parts of Cambridge near the Charles River were previously underwater and later filled in.
The wall partially collapsed in 2020 and was never repaired. Scarce funding and complicated jurisdiction left it crumbling, and rats — lots of rats — moved in. Last year, Denise Jillson, the Harvard Square Business Association’s executive director, asked public health experts in Cambridge and at Harvard University for help analyzing the problem.
“That site is akin to a prairie dog village … but with rats,” said Richard J. Pollack, Harvard’s senior environmental public health officer.
In March, Jillson issued a release calling on the community and stakeholders to “together to find a solution to the complex challenge of preserving this historical relic that sits on private property.” The release included an illustrated comic about the wall and its history created by Caro Taylor, a Cambridge resident and a junior at the Commonwealth School in Boston who was an intern at the HSBA last summer.
The “Old Stone Wall” runs from Winthrop Street, through Charlie’s Beer Garden, and out to Eliot Street. The better-preserved section, which divides Charlie’s and the former Red House restaurant (soon to be relaunched as the Cox Hicks Club), is an impressive 8- to 10-foot high structure, still intact. The collapsed section of the wall — adjacent to Eliot Street, tucked behind the IHOP — is not publicly visible except through a small alley. Here the wall is 4 or 5 feet tall.
A combination of factors likely contributed to its deterioration, according to the city and the Harvard Square Business Association: age, erosion, weather, ongoing disturbances from area construction, and rats.
The wall was built with large fieldstones laid in a battered profile that lean inward — a technique used in early retaining walls to release pressure. The rocks were dry-laid to allow water to pass through the wall rather than build up behind it. The stones are local: Roxbury Puddingstone from that neighborhood’s Parker Hill and granite from quarries on the Boston Harbor Islands.
“It’s not the only stone wall in Harvard Square, but it is by far the largest and most significant,” Sullivan said.
The wall is located within the Harvard Square Conservation District, which means work requiring a building permit generally requires review by the historical commission. However, the commission’s jurisdiction applies only to features visible from a public way. Portions of the wall are located behind buildings on private property and cannot be seen from the street, limiting the commission’s authority over those sections.
Given the wall’s historic value, the city appropriated $200,000 in Community Preservation Act (CPA) funds in 2021 to shore up the Eliot Street section of the wall. The estimated cost was about $400,000, however, and since it is on private property Sullivan asked commercial property owners to contribute the additional $200,000.
Of the property owners, only Paul Overgaag, who owns 98 Winthrop Street (previously home to The Red House) and also Charlie’s Kitchen at 10 Eliot Street, agreed to contribute. Raj Dhanda, owner of the Crimson Galeria building and the property at 96 Winthrop Street (formerly the House of Blues, now The Boiling Crab), expressed concerns about the scope of the project and the financial burden. The project stalled, and in 2024, the city reallocated the CPA funds.
In a recent phone interview, Dhanda said he believed the city should have paid more of the project’s cost. He also disputed the $400,000 price tag. At the time, his own contractor estimated that the work would cost less than $200,000.
One of the primary concerns has been the growing rat population in the alley near the wall. As the wall continues to deteriorate, it might create even more hiding and nesting pockets for rats, Jillson said. The imminent public health risks from rats — and their recent surge in Cambridge — have been well documented. At a public meeting last year, Cambridge City Manager Yi-An Huang said, “These rodents are, as I understand it, reproducing faster than we can possibly catch up.”
Jillson also fears that the burrowing rats might also be destabilizing the soil and thus contributing to the wall’s deterioration. “That wall is basically infested with rodents, and it’s compromising the integrity of the soil,” she said.
The alleyway behind the Too Hot Sichuan restaurant and IHOP is a hotbed of rat activity in the square, Pollack said. Had the restoration moved ahead, it would have included implementing a cement backing to the wall. That would have helped secure the stones and abate erosion. It would also have effectively blocked the rats from burrowing.
Jillson hopes her press release spurs action. The economic climate, however, is significantly different.
For What it's Worth 