Kolkata, located in West Bengal, India, boasts a rich tapestry of historical architecture, with buildings dating back to the 18th and 19th centuries. The Old Mission Church, established in 1770 by Swedish missionary Johann Zachariah Kiernander, is the oldest Protestant church in the city, known for its striking red brick facade. Another significant structure is the Writers' Building, designed in 1777 to serve as the administrative office for junior clerks of the East India Company, featuring a distinctive Greco-Roman style. The Raj Bhavan, built in 1803, serves as the official residence of the Governor and showcases grand ionic columns. The Indian Museum, established in 1814, is recognized as the oldest and largest museum in the Asia-Pacific region, housing a diverse collection of antiques and artifacts. Other notable buildings include St. John’s Church (1787), Town Hall (1813), Sanskrit College (1824), and Metcalfe Hall (1844), each contributing to Kolkata's architectural heritage and historical narrative.