The document discusses the Transitional Period in architecture, which occurred between premodern and modern styles. It provides examples of buildings from this period like Chiswick House in London, which had Palladian influences. Mereworth Castle in Kent was also Palladian-inspired. St. Pancras Church adopted Greek Revival elements. Westminster Palace was rebuilt in the Gothic Revival style after a fire. The Arc de Triomphe in Paris commemorated victories of the French Revolution and Napoleonic Wars. Overall, the Transitional Period saw a blending of premodern styles as architects experimented with new approaches before the emergence of Modernism.