File:Chicago Fire of 1871, Interior of Post Office (NBY 1320).jpg
![File:Chicago Fire of 1871, Interior of Post Office (NBY 1320).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Chicago_Fire_of_1871%2C_Interior_of_Post_Office_%28NBY_1320%29.jpg/429px-Chicago_Fire_of_1871%2C_Interior_of_Post_Office_%28NBY_1320%29.jpg?20180302154242)
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