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How did Philip Johnson change the Museum of Modern Art building?

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Neue Staatsgalerie in Stuttgart, designed by Sir James Stirling, featuring tan stone walls, a slanted green-framed glass window, and colorful blue and pink railings. — Museum of modern art The New State Gallery (Neue Staatsgalerie), Stuttgart, Germany, designed by James Stirling, completed in 1984.

Philip Johnson contributed to the Museum of Modern Art (MoMA) building by designing an addition to the original 1939 structure, which had been created by Philip Goodwin and Edward Durell Stone. Additionally, Johnson planned the museum's garden in 1953.1

Beyond these physical modifications, Johnson played a significant role in the institution's history as the director of its Department of Architecture, a position he held from 1932 to 1934 and again from 1946 to 1954.2