国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 3月27日 05時22分

Papers of Morris Jacks, an engineer hired to appraise the value of the structure. It gives a floor-by-floor analysis. You can see whose offices included women's bathrooms and which didn't, so there is social history in #engineering

[BIHAKUEN]UVシールド(UVShield)

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