By Jared Ebersole in Video — 04 Jun 2026

How Tammany Hall Became a Petco Under a Turtle Shell

The old Tammany Hall building at Union Square preserves the facade of New York's most famous political machine, then crowns it with a glass dome inspired by Lenape imagery.

The former Tammany Hall building at Union Square is one of those New York addresses where the punchline is almost too easy.

This was once the home of the city's most famous political machine. Today, there is a Petco at the base.

That contrast is funny, but it is not the whole story. The building is also a case study in how New York preserves a facade, guts an interior, adds a new structure behind it, and asks architecture to carry a very complicated memory.

Where it is

44 Union Square East, New York, NY 10003

Tammany Hall was not simply a corrupt clubhouse, though corruption became central to its reputation. It was a political organization that understood city life at street level. For immigrants arriving in New York, especially Irish immigrants fleeing famine and poverty in the 19th century, Tammany could be the first institution that offered practical help: work, coal, food, legal assistance, favors, introductions, and a place inside the machine of city politics.

The exchange was votes.

Tammany's genius was transactional democracy. It met people when the formal city did not, then converted loyalty into turnout. That system could be protective, exploitative, and corrupt at the same time. It helped immigrants enter civic life while also turning public office into a patronage network.

No figure embodies the darker side more than William M. "Boss" Tweed. In the 1860s and early 1870s, Tweed and his ring manipulated contracts, padded bills, controlled appointments, and siphoned public money on an enormous scale. Estimates of the theft vary, but accounts often place the total as high as $200 million in 19th-century dollars. Tweed was eventually convicted and died in jail in 1878.

Tammany survived him.

The organization kept influencing New York politics through new bosses, new alliances, and new methods. But the 20th century weakened it. Franklin D. Roosevelt, though a Democrat, did not operate as a Tammany loyalist. Reform investigations, shifting coalitions, and the election of Fiorello La Guardia as mayor in 1933 helped push the machine toward irrelevance.

The Union Square building arrived near the end of that story.

Tammany built its neo-Georgian headquarters at 44 Union Square East in 1928 and 1929, at a moment when the organization still wanted to present itself as dignified, patriotic, and historically rooted. The building borrowed colonial and civic architectural language: brick, limestone, arches, a portico, and a formal presence on the square. It was a political clubhouse dressed as respectable American tradition.

It did not remain Tammany's for long. By the 1940s, the society sold the building. Later uses included labor, theater, and education. The structure became a landmark in 2013, not because Tammany was admirable, but because the building was historically and architecturally significant.

Then came the transformation.

The renovation by BKSK Architects preserved the landmarked north and west facades, but the old interior was largely demolished. According to engineering and architecture coverage, the historic facades were disconnected from the original steel structure, braced in place, and then attached to a new reinforced-concrete structure behind them. The project effectively kept the public face while rebuilding the body.

That is a classic New York compromise, but this one added a startling new crown.

On top of the old Tammany Hall building is a glass-and-steel dome inspired by a turtle shell. BKSK connects the idea to the Lenape creation story and to Chief Tamanend, the Lenape leader whose name was appropriated by the Tammany Society. The dome added about 30,000 square feet of interior space and turned the former three-story clubhouse into a larger retail and office building.

The symbolism is complicated.

Tammany used Indigenous imagery as part of its political mythology while building a machine that had little to do with Indigenous sovereignty or history. The renovation tries to surface that buried namesake by making the turtle shell visible in the architecture. It is not a simple redemption. It is more like a correction written in glass above a brick facade.

The Landmarks Preservation Commission would not allow the old building to be visually swallowed by a generic addition. So the new work had to negotiate with the original roofline and proportions. Terra-cotta sunshades help mediate the transition, echoing the slope and rhythm of the historic form while the dome announces that the building is no longer frozen in 1929.

At street level, the result can feel surreal.

A pet-supply store occupies space once associated with the city's most feared political organization. Above it, the preserved facade performs old civic respectability. Above that, the turtle-shell dome hints at a deeper origin story that Tammany's own mythology had flattened.

That layering is very New York.

Buildings here rarely keep a single meaning. They accumulate them. Tammany Hall was a clubhouse, a symbol of corruption, a landmark, a redevelopment puzzle, an office-and-retail property, and now an address where everyday commerce sits under one of the city's stranger rooftop additions.

The machine is gone.

The facade survived.

And the building, in its odd new form, tells a better story than a plaque alone could: power changes hands, corruption becomes history, history becomes real estate, and sometimes the old headquarters of a political machine becomes a place to buy dog food under a glass turtle shell.