A new cultural space dedicated to showcasing the work of Alexander Calder, the sculptor and artist known primarily for his mobiles, has been planned for Philadelphia, the Calder Foundation announced on Thursday.

According to the foundation, a new nonprofit organization will be on Benjamin Franklin Parkway, where construction is expected to begin in early 2021. The scenic boulevard is already home to art by three generations of Calders. Calder’s mobile “Ghost” hangs in the main hall of the Philadelphia Museum of Art; the Swann Memorial Fountain in Logan Circle was designed by his father, Alexander Stirling Calder; and the statue of William Penn that sits atop City Hall was designed by Calder’s grandfather, Alexander Milne Calder.

The architectural firm Herzog & de Meuron has been selected to design the space, and while plans aren’t expected to be unveiled until later this summer, Alexander S.C. Rower, the foundation’s president and a grandson of the artist, emphasized that the project “is not a museum.”

“In his day, he always thought that these works of art would end up in people’s houses and then have this really intimate experience with the work,” Mr. Rower said in a phone interview. “The goal is to get an entirely new way to experience Calder’s work. Make it intimate, make it human in scale instead of it being a big unwieldy institution. It’s more like a sanctuary.”