The Austonian (Austin), Trammell Crow Center (Dallas), continental Center I (Huston)
The Warsaw Pact sought to reinforce communist dominance in Eastern Europe. The Soviet Union formed this alliance as a counterbalance to the North Atlantic Treaty Organization (NATO)
I believe the term refers to architectural styles which draw inspiration and influence from forms seen in nature. Or, architecture that is built to blend seamlessly into natural settings like cliffsides or forested areas.
After the civil war the single political entity was confirmed which led to more than four million enslaved Americans being freed. A more established federal government was also a consequence of the civil war.