Office of the Institution for Social and Policy Studies

Office of the Institution for Social and Policy Studies

91 Trumbull St, New Haven, CT 06510

Yale's Office of the Institution for Social and Policy Studies resides in a building with rich architectural history tied to the student culture and social influence of the university. The building was commissioned and built in 1884 for the Wolf's Head Senior Society, a group established to challenge the exclusive secret society culture at Yale. The building's standout, deliberately bold architecture --a figurehead of the Richardson Romanesque style designed by McKim, Mead & White Architects-- symbolizes the ambitious intents of its commissioners to drive change in the Yale student experience. After being sold to Yale in 1924 and rented out or used for various university-adjacent groups and institutional functions since, the building's standout design and foreboding presence have become integrated into the University's architectural heritage, today more reflective of the institution's storied and elite image than critical of it.

Researcher

Yamato Takabe

Last Updated

June 22, 2026 at 7:39 PM EST by carter.flemming@yale.edu

Style

Romanesque Revival

Current Use

University/CollegeCollege / University

Era

1860-1910

Neighborhood

Yale Campus

Year Built

1884

Architect

McKim, Mead & White

Current Tenant

Yale University

Roof Types

Gable

Street Visibilities

Yes

Threats

None known

Dimensions

35 x 70

Street Visibilities

Yes

Owner

Yale University

Ownernishp Type

Private;Yale

Client

The Phelps Trust Association

Historic Uses

Student Society HallYale Secret SocietyCollege / University

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These photos were both taken from the exterior of the building. The photo on the right was taken from the West side of 91 Trumbull Street looking into the short stone parapet walls and the gap between the sidewalk and the building itself. The photo on the right is a close up of one of the brownstones on the building. It showcases the randomness in the extrusions and cuts of the stones used.
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The main entrance of 91 Trumbull Street from the interior and exterior. The left photo was taken from the Southwest corner of the building. The white arrows on the left photo are pointing to the edges of the iron gates that are extremely sharp. The red arrow is pointing to the polychrome Roman arches where the red sandstone and brownstone vary in color and are interspersed with smooth carved sections as opposed to the rest of the building. The photo on the right was taken from the interior of the door shown in the photo on the left. The bucket circled in red can be used as a reference for measurement as it was around 1.5 feet tall and 1 foot in diameter.
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These are two signs found in the ISPS complex. The photo on the left was taken from the first floor of 91 Trumbull Street. The photo on the right was taken from the basement of 87 Trumbull Street. They both clearly have different fonts.
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The north side of 91 Trumbull Street is shown from the exterior. The top red arrow is pointing to the one of the two crow-stepped gables. The bottom red arrow is pointing to the vine overgrowth showing the interplay between nature and architectural prominence.
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This is the Sanborn map of Hillhouse Avenue, Trumbull Street, and Prospect Street in 1911. Circled in black in the top right corner is the Wolf’s Head “Old Hall” owned by the “Phelps Association.” As shown, there have been no edits as they have owned and stayed in the building since its construction.
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This is the Sanborn map of Hillhouse Avenue and Trumbull Street in 1930. Circled in black in the bottom left corner is the Wolf’s Head “Old Hall.” As shown, there have been many edits since Wolf’s Head moved to a new location in 1924. It is labeled as laboratory because of an establishment of a behavioral lab at the time in the basement.
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This is the Sanborn map of Hillhouse Avenue and Trumbull Street in 1923. Circled in black in the bottom left corner is the Wolf’s Head “Old Hall.” As shown, there have been no edits as they have owned and stayed in the building since its construction.
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The difference in light color due to the stained-glass window. The blue circular window on the left is facing south and the orange circular window on the right is facing the north.
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Picture of Wolf's Head fraternity house from 1901 taken from the Southwest corner. The building was much more coated with vines and brush back then. However, the short stone parapet walls have remained.
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These images show the well-maintained wood carvings and intricate designs in the interior of the building. All details lining the door, ceiling, and pillars seem to have been re-polished at a recent date.

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