This document summarizes the architectural history of colonial buildings in Kolkata, India from the 18th-21st centuries. It describes several iconic buildings like the Writer's Building, Raj Bhavan, Indian Museum, and Victoria Memorial that were constructed in the Neoclassical, Baroque, and Indo-Saracenic styles. It also mentions how the architectural styles evolved over time from English colonial architecture to incorporate more local Indian elements, and emerging Art Deco structures in the early 20th century.