"Devagiri was attacked twice by the forces of the Delhi Sultans, first in the reign of Alauddin Khalji, and second, in the time of his successor, Mubarak Khalji. As a result of the two invasions, its physical landscape underwent a radical change. Sometime between 1313 and 1318, a grand congregational mosque, Deccan’s earliest surviving Islamic monument, was constructed at the centre of the city. It ranked next only to Delhi’s Qutab mosque in size. M.S. Mate and T. V. Pathy, who studied the mosque, showed that it was built from parts of Hindu and Jain temples. One hundred and seventy-seven columns carved in the Yadava style were used in the construction of the mosque, of which one hundred and six were placed in the central prayer hall.... Richard Eaton and Philip Wagoner argued that in constructing the mosque, the Khaljis “simultaneously liquidated and absorbed most if not all the religious monuments that had theretofore defined the city.”"