How did some old trading centres lose their glory and became de-urbanised?
Some old trading centres lose their glory and became de-urbanised because main focus of urban development came to be centred on the three port towns-Bombay, Calcutta and Madras. These places later became the Presidency towns. Many towns, that had been popular earlier for some specialised goods, lost their glory with the decline in demand for their products. The old trading centres and ports were replaced by new trade centres.