The Territorial Building was designed by the architect Arthur Reynolds, in the Classical Revival architectural style.

A four-story tower sits atop a two-story base, with decoration only in the public areas.

During season nine (1976) of the television series Hawaii Five-O, Steve McGarrett and his men had their offices in the Territorial Building rather than their usual home at the ʻIolani Palace, which was undergoing renovations at the time.

[citation needed] In the 2010 remake, the building facade serves as the Hawaii Five-0 (2010 TV series) crime lab.

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