How did the old city of …

The British changed the old city of Delhi entirely. They wanted Delhi to forget it's Mughal past. Hence, the area around the Fort was completely cleared of gardens, pavilions and mosques. Thus, either destroyed the mosques or put them to other uses. For example, the Zinat-al-Masjid was converted into bakery. No worship was allowed in the Jama Masjid for five years. One-third of the city was demolised and its canals were filled up. In the 1870s, the western walls of Shahjanabad were broken to establish the railway and to allow the city to expand beyond the walls. The British began living in the sprawling Civil Lines area that come up in the north away from the Indians in the walled city. The Dehli College was turned into a school and shut down in 1877.