After nearly 140 years of construction, the Basilica di Santa Maria del Fiore was formally consecrated with elaborate ceremony, its skyline-defining dome completed just two years earlier through Brunelleschi's ingenious engineering. The building embodied Florentine civic pride and Renaissance ambition, and its dome remains the largest brick dome in the world.

March 4, 1789 was the date set for the new federal government to begin operating under the ratified Constitution. In practice, the first Congress struggled to assemble a quorum in New York City, and George Washington would not be inaugurated until April 30. Still, the date marks the formal birth of the constitutional government that has governed the United States ever since.

Vermont had operated as a sovereign republic since 1777, printing its own money and issuing its own citizenship. Its admission on March 4, 1791 marked the first expansion of the United States beyond the original colonies, setting a precedent for how new states would join the Union and easing tensions over New York's competing land claims.

Originally organized as United Independent Broadcasters, the network was struggling financially within months until the Columbia Phonograph Company invested and lent its name, creating the Columbia Broadcasting System. Under William S. Paley's later leadership, CBS grew into one of America's dominant media empires, pioneering news broadcasting and entertainment programming for decades.