I agree they share elements, and that’s totally expected given their architectural style lineage.

Central Post & Telegraph building is classified as Neo-Baroque[1], while the Harold Washington Library (of significantly later construction) reflects many of the Beaux-Arts[2] forms and ornamentation.

[1] https://en.m.wikipedia.org/wiki/Baroque_Revival

[2] https://en.m.wikipedia.org/wiki/Beaux-Arts_architecture

wow thanks for the architectural info. This is what I like about HN.