Browsing Wikipedia the other day, I stumbled upon the David White House, which is a National Historic Landmark at 1459 Girard. Kind of interesting, never knew about this.
White was a famous geologist and former chief geologist of the US Geological Survey who lived in the house for 15 years, from 1910 to 1925. The Park Service site says he was a "leading expert on the origin and evolution of oil distribution basic to the petroleum industry."
The house was declared a National Historic Landmark in 1976. Here's more on White and on the house from the Park Service.
Photo by AgnosticPreachersKid