517 6th St. SE is the former residence of Gary Hart, a Democratic US senator from Colorado from 1975 to 1987. Hart was the front-runner for the 1988 Democratic presidential nomination until he dropped out over allegations that he was having an extramarital affair with model Donna Rice. In April 1987 Gary Hart and Donna Rice were spotted at his residence by reporters from the Miami Herald. This home has changed hands twice since 1987 and is still used as a private residence.
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For more information on these historic sites, go to the restoration society’s web page for the walking tour at http://chrs.org/historic-sites-tour-2020/
Best to view in "Original" because other versions resized by Pbase are decidedly unsharp.
Terrace Court alley houses, posted earlier: