Gramercy Park Block Association
Gramercy Stories · No. 1

19 Gramercy Park South

The house that became the Sonnenberg Mansion — and the hostess who made it a stage

Mamie Fish had a top-floor ballroom added to this house. Decades later, the publicist Benjamin Sonnenberg filled it with art and gave parties of his own. The red-brick house at the corner of Irving Place has had several names, but entertaining runs through its history.

It began as 86 Irving Place and became the Stuyvesant Fish House in 1887, when the railroad president and his wife, Marion Graves Anthon Fish—Mamie to everyone—bought it. Sonnenberg’s long residence gave it the name by which many neighbors still know it: the Sonnenberg Mansion.

Mamie, as it happens, has never entirely left the stage. Jennifer Wright’s 2025 biography, Glitz, Glam, and a Damn Good Time, offers a modern entry point into the woman behind the legend. Her particular blend of wit, spectacle, and nerve still travels well.

Historic corner view of 19 Gramercy Park South, with the adjoining building on Irving Place.
19 Gramercy Park South in a historic photograph captioned 1909, at the corner of Irving Place.

A House That Rose out of the Park

The house is older than its fame. In 1845, William Samuel Johnson, a New York lawyer and grandson of the William Samuel Johnson who signed the Constitution and served as the first president of Columbia College, built a brick house on the corner lot where Irving Place meets the Park. He was building under Samuel Ruggles's rules. The 1831 deed that created Gramercy Park restricted construction within forty feet of the front of the surrounding lots to brick or stone dwellings at least three stories high. Johnson’s house was one of the early results.

Johnson was more than a lot owner. He was one of the first Trustees chosen to replace Ruggles's original five, and he served from 1844 to 1854, the years in which the Trustees planted the newly fenced Park, hired a man with the happy name of James Virtue to set out a thousand privets inside the fence, and argued over a fountain. No. 19 has been bound up with the running of the Park from the beginning.

The original house had four stories. Its next owner, Horace Brooks, built a stable beside it on Irving Place and later added a fifth story beneath the black mansard roof that still crowns it. By the time the Fishes arrived in 1887, Gramercy Park had become one of the most fashionable addresses in the city, and No. 19 was ready to become less a private residence than a stage for arrival, surprise, and a steady stream of guests.

In his 1979 New Yorker piece on the house, Brendan Gill described No. 19 as a house whose brickwork and mansard roof seemed to grow from the Park's foliage. It is hard to imagine a better description of the place: not simply a grand house beside Gramercy Park, but one that seems to have risen from it.

The red-brick Fish-Sonnenberg House at 19 Gramercy Park South, with its dark shutters and mansard roof.
19 Gramercy Park South

The Address Mamie Changed

For Stuyvesant Fish, 1887 was an eventful year. The son of Hamilton Fish — Governor, Senator, and Secretary of State under Grant — and a descendant of Peter Stuyvesant, he became president of the Illinois Central Railroad that year, a post he would hold for nearly twenty years, and he bought the house at the corner of Irving Place. In 1893 he became a Trustee of Gramercy Park, which makes two Trustees who called No. 19 home.

Mamie deserves credit for one of the house's most memorable transformations. When the Fishes purchased the property, its official address was 86 Irving Place. Mamie had it changed to 19 Gramercy Park South, even though the entrance remained squarely on Irving Place. The doorway stayed put; the house's identity did not.

It was a small act of social theater, and a wonderfully practical one: Mamie put the Park directly into the house's name. The new address announced where the home belonged, and how she intended it to be remembered.

Stuyvesant Fish, railroad president and Trustee of Gramercy Park.
Stuyvesant Fish, a Trustee of Gramercy Park from 1893.

The House as Stage

Following the Fishes’ purchase in 1887, the house was remodeled for entertaining. Its marble staircase and top-floor ballroom are widely attributed to Stanford White, although some architectural histories credit Sidney V. Stratton.

White’s work is also part of the story of The Players at No. 16, a few doors along the Park.

Mamie had no patience for a house that merely looked impressive. It had to perform, and she knew how to direct it. She became known as a "fun-maker," direct, outspoken, and quick-witted, a hostess who preferred wit to ceremony and movement to monotony. Her "fifty-minute dinners" challenged the era's long, formal meals: enough time for a good dinner, but not enough time for the evening to go stale.

“Make yourselves at home … and believe me, there is no one who wishes you were there more than I do.”

A quip attributed to Mamie Fish

Gramercy Park was the opening act. Around the turn of the century, the Fishes moved uptown to a new Stanford White mansion at 25 East 78th Street, completed in 1900, and it was there, and at Crossways in Newport, that Mamie's entertaining reached its full and notorious scale. But the habits were formed here: the short dinner, the sharp tongue, the conviction that a party should move.

Mamie Fish seated in an evening gown and jeweled headdress.
Mamie Fish

From Fish House to Sonnenberg Mansion

The house's cast changed, but its appetite for performance did not. The Fishes kept No. 19 after they moved away, and the property continued to evolve. In 1909, the stable was replaced by a studio-apartment building. In 1931, Benjamin Sonnenberg, the publicist who would become one of New York’s great professional hosts, and his wife, Hilda, moved into the lower two floors. In 1945, they bought the entire property and connected the original house with the apartment building, creating a residence of thirty-seven rooms filled with art, antiques, and conversation.

In his 1979 account, Brendan Gill described Sonnenberg opening small top-floor rooms into a red-and-white ballroom overlooking the Park, with a film-projection booth concealed behind a wall. That later chapter is why the house is often known today as the Sonnenberg Mansion, though its earlier lives as 86 Irving Place and the Stuyvesant Fish House remain inseparable from its identity.

René Robert Bouché’s portrait of Benjamin Sonnenberg seated at his desk, surrounded by books and collected objects.
Benjamin Sonnenberg, 1955, by René Robert Bouché.

Thirty-Seven Rooms

Sonnenberg was born in Brest-Litovsk in 1901 and brought to the Lower East Side as a boy. He grew up to be one of the best-known publicists of his era, the man that companies like CBS and Lever Brothers hired when they wanted to be admired rather than merely known, and he understood, as Mamie had, that a house could do work no press release could. He filled No. 19 with portraits, drawings, and an enormous collection of antique brass, kept a butler and a staff to match, and gave parties at which cabinet secretaries, publishers, actors, and his own clients found themselves seated together. "Always live better than your clients" was his rule; it became the title of his biography. The house was his masterpiece of public relations, and everyone who climbed the staircase knew it.

In his 1950 profile, Geoffrey T. Hellman described the evening’s progression: dinner downstairs, an elevator ride to a private screening upstairs, then roast-beef sandwiches and highballs in the second-floor living room. The cinema seated fifty on red plush divans and armchairs. Hilda sometimes preferred a movie with a friend to her husband’s parties.

Guests gathered at a party inside 19 Gramercy Park South, circa 1940.
A party at 19 Gramercy Park South, circa 1940.

Sonnenberg died in 1978. The following June, Sotheby Parke Bernet dispersed the house’s collections at auction. In February 1979, as preparations for the sale were under way, Time had titled its account “Dismantling an Opulent Fossil.”

The house passed to Baron Walter Langer von Langendorff, founder of Evyan Perfumes. It was sold to fashion designer Richard Tyler and his wife, Lisa Trafficante, in 1995, and changed hands again in 2000. Since 1966, the house has been part of the Gramercy Park Historic District.

Restoring No. 19

The Block Association followed exterior restoration at 19–20 Gramercy Park South, reporting on the work and discussing sidewalk access, noise and dust with the people responsible.

Read the Block Association’s restoration record

See Sloan’s painting in Gramercy in Art, alongside other artists’ views of the neighborhood.

John Sloan’s painting of a mother and children beside a baby carriage in leafy Gramercy Park, with a red-brick house beyond.
John Sloan, Spring, Gramercy Park, 1912.
The building at a glance

The building record

Address today
19 Gramercy Park South
Southeast corner of Gramercy Park South and Irving Place.
Earlier address
86 Irving Place
Mamie Fish is credited with giving the house its Park-facing name.
Original house
1845
Built for William Samuel Johnson, a New York lawyer and Trustee of Gramercy Park from 1844 to 1854.
Alterations
1860s · 1887
Mansard fifth story added in the 1860s; interiors remodeled for the Fishes after their 1887 purchase. The architect’s attribution is disputed.

Over time

1845

A house at 86 Irving Place

A four-story brick house is built for William Samuel Johnson, then a Trustee of Gramercy Park.

1860s

A new silhouette

Horace Brooks adds a fifth story beneath the mansard roof; the stable was built earlier.

1887

The Fishes arrive

Stuyvesant and Mamie Fish buy the house and undertake alterations for entertaining.

1909

Another use for the stable site

A studio-apartment building replaces the stable.

1931

The Sonnenbergs move in

Benjamin and Hilda Sonnenberg rent the lower two floors.

1945

A thirty-seven-room mansion

The Sonnenbergs buy the property and combine the buildings into a home filled with art, books and guests.

1966

Historic district protection

No. 19 becomes part of the Gramercy Park Historic District.

1978–1979

The end of the Sonnenberg chapter

Benjamin Sonnenberg dies in 1978; the collections are auctioned in June 1979 and the house is sold.

1995 · 2000

Later owners

Richard Tyler and Lisa Trafficante purchase the house in 1995; it changes hands again in 2000.

2003–2014

Restoring the house’s historic exterior

The Block Association’s accounts follow two restoration chapters and their effects on the surrounding neighborhood.

Sources cited
Photo credits for this page