Independence Day: 20 rare pictures from pre-1947 era to relive freedom struggle

From the first Indian National Flag that was hoisted on August 7, 1906, at Parsee Bagan Square in Kolkata to the first version of our current national flag that was designed by Pingali Venkayya at Bezwada in 1921, here are 20 rare pictures from 1947, the year India attained Independence.