When photographer Richard Barnes was in Fort Worth, Texas, documenting the new Renzo Piano Pavilion at the Kimbell Art Museum (designed, appropriately, by Renzo Piano, Hon. FAIA), he also documented the beloved 1972 masterwork designed by Louis Kahn that gave the arts institution its architectural pedigree. Here are some of those photos of what Kahn's Kimbell looks like 41 years on, supplemented with some of Kahn's original sketches, and archival photos from the design and construction process of the iconic structure.

The main entrance, with its grove of trees. View from the west.

The main entrance, with its grove of trees. View from the west.

Credit: Richard Barnes


View southwest toward the new Renzo Piano Pavilion from under the colonnade of the Kahn building.

View southwest toward the new Renzo Piano Pavilion from under the colonnade of the Kahn building.

Credit: Richard Barnes


Kahn's 1972 building for the Kimbell Art Museum. View from the southwest.

Kahn's 1972 building for the Kimbell Art Museum. View from the southwest.

Credit: Richard Barnes


Double staircase, leading from oft-used east entrance up to the galley levels on the main floor.

Double staircase, leading from oft-used east entrance up to the galley levels on the main floor.

Credit: Richard Barnes


Gallery, with daylit vaults.

Gallery, with daylit vaults.

Credit: Richard Barnes


View through to several vaulted galleries in the Kahn building.

View through to several vaulted galleries in the Kahn building.

Credit: Richard Barnes


Paintings hung on the travertine gallery walls.

Paintings hung on the travertine gallery walls.

Credit: Richard Barnes


View of the café.

View of the café.

Credit: Richard Barnes


Theater in the original Kahn building (in this case showing a film of Renzo Piano describing the new pavilion).

Theater in the original Kahn building (in this case showing a film of Renzo Piano describing the new pavilion).

Credit: Richard Barnes


Courtyard.

Courtyard.

Credit: Richard Barnes


Louis Kahn in front of the completed Kimbell Art Museum, photographed on Aug. 3, 1972.

Louis Kahn in front of the completed Kimbell Art Museum, photographed on Aug. 3, 1972.

Credit: Robert Wharton/University of Pennsylvania Archives


Schematic section drawing (circa September 1967) of galleries and courtyard.

Schematic section drawing (circa September 1967) of galleries and courtyard.

Credit: Courtesy Kimbell Art Museum/University of Pennsylvania Archives


Perspective sketch by Kahn of the gallery interior (circa March 1967).

Perspective sketch by Kahn of the gallery interior (circa March 1967).

Credit: Courtesy Kimbell Art Museum/University of Pennsylvania Archives


Kimbell Art Museum site model (circa September 1968), the fourth version of the design.

Kimbell Art Museum site model (circa September 1968), the fourth version of the design.

Credit: Robert Wharton/University of Pennsylvania Archives


Richard Brown, the first director of the Kimbell Art Museum, looking at drawings (circa 1968).

Richard Brown, the first director of the Kimbell Art Museum, looking at drawings (circa 1968).

Credit: Courtesy Kimbell Art Museum/University of Pennsylvania Archives


Gallery section drawing.

Gallery section drawing.

Credit: Courtesy University of Pennsylvania Archives


Aerial photo taken during construction.

Aerial photo taken during construction.

Credit: Robert Wharton/University of Pennsylvania Archives


For more on the Renzo Piano Pavilion at the Kimbell Art Museum, including critiques, videos, and photo galleries, click here.