A 1905 Act of Congress incorporated the Sons of the American Revolution (SAR), which had been founded in San Francisco in 1875. This Congressional Charter specified that the SAR should heed the sobering injunctions of George Washington in his Farewell Address. His words of warning were cast into a bronze plaque that the SAR installed in San Francisco City Hall in 1929.
Relevant text from this plaque (the top of which is pictured above):
". . . In contemplating the causes which may disturb our Union, it occurs as matter of serious concern, that any ground should have been furnished for characterizing parties by Geographical discriminations, Northern and Southern, Atlantic and Western; whence designing men may endeavor to excite a belief that there is a real difference of local interests and views. . . .
"Towards the preservation of your government, and the permanency of your present happy state, it is requisite, not only that you steadily discountenance irregular oppositions to its acknowledged authority, but also that you resist with care the spirit of innovation upon its principles, however specious the pretexts. . . .