Development A museum dedicated to the
Philadelphia–born sculptor
Alexander Calder was first proposed by mayor
Ed Rendell in 1998 as a collaboration between the city and the Calder Foundation, the family–run nonprofit which manages Calder's estate. Planning and fundraising commenced and a city–owned site was set aside on the
Benjamin Franklin Parkway; a number of works by the artist were installed outdoors on the site in 2002 and 2004 and became known as the Calder Garden. Despite this, the project stalled and was announced as canceled in 2005, Alexander S.C. Rower, Calder's grandson and the president of the foundation, said that he told supporters he did not want to build a traditional museum, instead envisioning "a place that’s meant for introspection, where you can be with art." The new project was announced in early 2020 with architecture firm
Herzog & de Meuron chosen to design the building, and announced that the gardens would be designed by
Piet Oudolf along with landscape architect Richard Herbert. By this point, the budget was raised to $70 million. In early 2025, the museum announced an adjusted opening date of Fall 2025 and appointed senior curatorial leadership, naming curator
Juana Berrío as senior director of programs. The final budget for the museum was close to $100 million, with a total contribution of $20 million from the
Commonwealth of Pennsylvania. The primary ongoing exhibition at the museum is a rotating installation of works by Calder from throughout his career. Museum leadership decided not to include explanatory wall texts or other didactic information in the museum, instead directing visitors to learn more about Calder via online sources. Rower and other museum leaders have said the institution hopes to emphasize the experience of viewing Calder's art in a tranquil setting, rather than foregrounding historical information about the artist or academic analyses of his art. ==Administration and programs==