Did you see this article in the Denver Post about the Library's historical map collections? Trove of Maps at Denver Public Library takes explorer on historic trip (8/31/2010).
It talks about historic Sanborn Fire Insurance maps that show historical views of Denver and other places. "As buildings changed, the maps were updated with paste-overs.... It's like showing geologic layers of Denver."
All DPL locations closed July 3-4. More...
Smiley Branch Library Basement / Toy Library Closed 7/13-8/5. More...
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