The Center for Brooklyn History (part of the Brooklyn Public Library system) sought approval for a signage program at the Long Island Historical Society building, an interior landmark in the Brooklyn Heights Historic District. Chris King of LBCK described a preexisting library sign system being adapted for the landmark: three sign types in a bronze finish to help visitors find entrances and learn about exhibitions, and a freestanding exhibit display in the areaway that would carry changing non‑illuminated inserts.

King said the design avoids adhesives on masonry and uses reversible fastenings set into mortar joints where possible. "Our installation details...require that there are mortar joints used for a mechanical fast fastening, and there are no glues or adhesives used on the facade itself," he said. He also said the exhibit case would not be illuminated and that the bronze finish would be etched so the graphic ages with the metal.

Preservation groups gave mixed public testimony. Christina Conroy of the Victorian Society said she feared sign overload and warned against affixing signs directly to narrow brick joints; she said, "Signs scattered like raisins on a cookie do not respect the historic character." Kaylee Johnson of the Historic Districts Council supported the modest sign designs but urged caution about the banner and asked the applicant to confirm removal of existing railing signs. Applicants and staff said the large banner is grandfathered and not part of the proposal and that the railing signs would be removed.

The commission approved the signage package after discussion. The resolution found the signs' size, materials and placement would not detract from the landmarked building or the Brooklyn Heights streetscape, and that the freestanding exhibit display would be reversible and smaller in scale than the building. The applicant and commissioners were asked to confirm final attachment details to mortar joints and to coordinate with staff on protection of brickwork during installation.