A single sheet of paper from 1957 announced the groundbreaking of a synagogue that was never built. The planned location, between Bay and Beach avenues in Beach Haven, was later deemed unsuitable, but the vision behind it remained. For Jon Geier, JCC board vice president and historian by training, that slip of paper represents something larger: an enduring community that’s grown stronger through adaptability, tradition and decades of shared purpose.

While that building never materialized, the vision did. This summer, the JCC celebrates its 75th anniversary with a…