In Goldhagen's Louis Kahn's Situated Modernism we read:
"In 1951, the [Adath Jeshurun] synagogue's leaders purchased a large polygonal site in Elkins Park, where many of its members were moving. The short end of the lot faced a major thoroughfare, and the remainder sloped back into a more pastoral setting that was bisected diagonally by a small stream (Fig. 4.1)."
And the caption of Fig. 4.1 reads: Sketch of the Elkins Park site for the Adath Jeshurun synagogue, 1954. From the Kahn Collection.
These citings convey misinformation. Kahn's design for Adath Jeshurun was sited on Old York Road within Philadelphia. Kahn's design was never executed, but Adath Jeshurun did ultimately build a new synagogue on a site (within a more pastoral setting) further north up Old York Road in Elkins Park. [This site misinformation is also conveyed within Louis I. Kahn: Complete Works 1935-1974.]
Goldhagen also mentions Wright's Beth Shalom [sic] synagogue. Beth Sholom is about a mile further north up Old York Road from the current Adath Jeshurun and about two miles north of Kahn's site for Adath Jeshurun.
Just coincidently, Kahn's first independent build work, the quondam Ahavath Israel synagogue, is about a half mile away from the Philadelphia site of Adath Jeshurun. And Kahn's Oser House is practically across the street from the bult Adath Jeshurun in Elkins Park. And Trumbauer built three Elkins' mansions for which Elkins Park is named. It's like a little architectural mecca along an ancient Indian trail.