BURIED BENEATH NEW YORK: Researcher Hunts for Long-Forgotten Mikvaos Hidden Under City Streets
Beneath the streets and buildings of New York City, remnants of the city’s earliest Jewish communities may still be waiting to be discovered, including long-forgotten mikvaos that once served generations of Jewish families.
A researcher at the City University of New York is attempting to locate these historic ritual baths, using archival records, old maps and archaeological evidence to reconstruct a largely overlooked chapter of Jewish life in America.
Miriam Entin, a doctoral researcher specializing in the archaeology of Jewish New York, is examining the locations of mikvaos established by Jewish communities dating back centuries, many of which disappeared as neighborhoods were demolished, rebuilt and transformed.
Despite nearly 400 years of Jewish settlement in New York, archaeologists have identified only three historic mikvaos in the city, a remarkably small number considering the central role of the mikvah in traditional Jewish communal life.
Entin believes that additional sites may remain beneath existing buildings, sidewalks and streets, preserved by the successive layers of construction that have reshaped Manhattan and other parts of the city.
Her research seeks to identify where these facilities once stood and determine whether any physical evidence has survived.
One of the most striking discoveries occurred in 2003, when construction workers preparing a residential development on Manhattan’s Lower East Side uncovered a tiled structure beneath an asphalt lot.
A backhoe exposed a white-tiled wall, prompting archaeologists to investigate the site more carefully. As they excavated, they uncovered marble steps descending into a rectangular pool, with a Magen Dovid formed from blue hexagonal tiles at the center of its floor.
Historical research established that Congregation Moshcisker Chevrah Gur Arye had occupied the property on East Third Street. Investigators concluded that the structure was likely a mikvah associated with the congregation.
The discovery offered a rare physical glimpse into the religious life of Jewish immigrants who had lived in the neighborhood more than a century earlier.
At the height of Jewish immigration to the Lower East Side, the neighborhood was home to hundreds of shuls and an enormous population of Jews, many of whom had fled poverty, persecution and pogroms in Eastern Europe.
One archaeological report noted that more than 500 congregations operated within an area covering less than one square mile during the early twentieth century. Some congregations rented rooms in tenement buildings, sharing space with other communal institutions.
For observant Jewish families, access to a kosher mikvah was an essential part of maintaining Jewish life in their new surroundings. Yet establishing and operating such facilities in overcrowded urban neighborhoods presented significant practical challenges.
Water supplies, sanitation, limited space and the expense of maintaining buildings all affected how mikvaos were constructed and operated.
Entin’s research concentrates particularly on the period between 1880 and 1920, when Jewish immigration transformed the Lower East Side and other neighborhoods throughout New York.
Rather than relying exclusively on archaeological excavations, she has been studying old Yiddish newspaper advertisements, historical property records and fire insurance maps.
The advertisements frequently identified the addresses of mikvaos and sometimes named the rabbonim responsible for supervising them. Other notices advertised their facilities or announced that properties were being offered for sale.
Fire insurance maps provide another source of evidence, recording the layout and uses of buildings during different periods.
By comparing maps published years apart, Entin can sometimes determine approximately when a mikvah opened, closed or disappeared.
“You can see, ‘Oh, in 1903 it says baths, but then in 1920 it doesn’t,’ so you know the mikveh was probably sold or demolished in between,” she explained.
In a report on her research published earlier this year, Entin said she had identified 38 historical mikvaos in New York City using advertisements and archaeological documentation. Her continuing research has expanded the picture considerably, identifying dozens of additional sites across the metropolitan area.
The locations extend beyond Manhattan to Brooklyn and the Bronx, with other historical mikvaos identified in Newark, New Jersey, and Philadelphia.
Entin is developing what she hopes will become the first comprehensive database of historic mikvaos in New York City, documenting their locations and the communities they served.
She has not yet publicly released the complete list of sites, explaining that the findings form part of her doctoral dissertation.
The researcher believes that some of the structures were destroyed during redevelopment projects, while others may remain intact beneath buildings that have undergone repeated renovations.
“Some of them were definitely destroyed. We know that a mikveh existed in a certain building, and now that building is a hotel, so there’s probably nothing there anymore,” she said.
“But there are almost certainly ones that exist intact in certain tenement basements and the landlord’s kind of waiting for somebody to knock on the door and ask about it.”
The difficulty of finding such sites reflects the realities of archaeology in a densely developed city.
Unlike archaeological excavations in open areas, researchers in New York generally have limited opportunities to investigate underground structures. Excavations frequently occur only when construction or renovation projects expose previously hidden remains.
Even when significant artifacts are discovered, archaeologists often face pressure to complete their work quickly so construction can resume.
Entin’s research therefore offers a way to reconstruct historical Jewish life even when the physical remains of a mikvah have disappeared.
The three sites identified through archaeological work were all located in or near Manhattan’s Lower East Side.
One was uncovered in 2001 beneath a vacant lot on Allen Street, near the historic Eldridge Street Synagogue. Another was discovered during renovations in a building on East Seventh Street. The third was the East Third Street mikvah uncovered in 2003.
The Allen Street discovery was particularly significant because researchers found a ritual bath associated with a former Russian bathhouse dating to the nineteenth century.
That mikvah had been buried beneath debris and construction material, preserving portions of the structure long after its original use had ended.
Entin’s research has also revealed how mikvaos changed along with the neighborhoods surrounding them.
As Jewish families gradually moved from the Lower East Side to other parts of Manhattan, Brooklyn and the Bronx, communal institutions followed.
Some mikvaos closed because their congregations relocated. Others disappeared when buildings were demolished to accommodate new streets, housing developments or public works projects.
The expansion of Allen Street, for example, resulted in the destruction of numerous properties, including sites associated with historical Jewish communal facilities.
Entin has also traced advertisements for a mikvah associated with Park East Synagogue on Manhattan’s Upper East Side. Later notices indicated that the facility was offered for sale, suggesting that its operation eventually ended.
Her work draws attention to an aspect of American Jewish history that has received relatively little archaeological attention.
While historians have extensively documented New York’s old shuls, cemeteries, schools and Jewish neighborhoods, the physical infrastructure supporting the observance of taharas hamishpachah has been studied far less.
Entin said the mikvaos offer insight into the everyday experiences of Jewish immigrants, including how they maintained religious observance under difficult living conditions.
Her research, she explained, “comments on the social world, the experience of these immigrants.”
The findings may eventually help archaeologists identify promising locations for future excavations and encourage property owners to recognize historically significant structures that might remain in their basements.
For now, Entin continues examining archival records and matching old addresses with modern properties, searching for traces of the mikvaos that served New York’s earlier Jewish communities.
She expects to complete her doctoral studies later this year, with her dissertation providing a more extensive record of the ritual baths that once stood throughout the city.
