This document discusses various revival styles in architecture that were based on historical styles from previous eras. It provides details on Palladianism, which was inspired by the designs of 16th century Italian architect Andrea Palladio. Palladian architecture is characterized by symmetry, proportion, the Palladian window, temple front, and use of classical orders. The document also discusses the Greek Revival style in America, which incorporated elements of ancient Greek temples like columns, pediments, and square window and door heads. Finally, it covers characteristics of the Gothic Revival style from the 1830-1860s, including pointed arches, steep gables, decorative trim, porches, and towers.