In 1608-09 Islam Khan transferred the capital to Jahangirnagar (Dhaka) in order to suppress the bara-bhuiyans and more effectively resist the growing power of the Portuguese and the Maghs.
From Rajmahal, construction progressed rapidly, moving westward along the banks of the Ganges, reaching Bhagalpur in 1861, Munger in February 1862, and opposite Varanasi (across the Ganges) in December 1862 and then on to Naini on the bank of the Yamuna.