The GPO Museum is a small philatelic museum beside Kolkata's General Post Office. Its displays cover the history of postal service in India, from mail runners and their equipment to stamps, letters, and postal memorabilia.
The collection includes letters and signatures linked to well-known Indian figures, along with material on the people who carried mail before modern transport. It is a compact stop in the BBD Bagh area, best for visitors interested in stamps, civic history, or colonial-era institutions.