American Renaissance
The American Renaissance was a period of American architecture and the arts from 1876 to 1917, characterized by renewed national self-confidence and a feeling that the United States was the heir to Greek democracy, Roman law, and Renaissance humanism. The era spans the period between the Centennial Exposition (celebrating the 100th anniversary of the signing of the Declaration of Independence) and the United States' entry into World War I.
Gilded Age
The early half of the Gilded Age roughly coincided with the middle portion of the Victorian era in Britain and the Belle Époque in France. With respect to eras of American history, historical views vary as to when the Gilded Age began, ranging from starting right after the American Civil War (ended, 1865), or 1873, or as the Reconstruction Era ended in 1877. The point noted as the end of the Gilded Age also varies. It is generally given as the beginning of the Progressive Era in the 1890s (sometimes the United States presidential election of 1896) but also falls in a range that includes the Spanish–American War in 1898, Theodore Roosevelt's accession to the presidency in 1901, and even the U.S. entry into World War I (1917).