Analysis of information sources in references of the Wikipedia article "Mosque City of Bagerhat" in English language version.
Khan Jahan (d. 1459) ... the inscription on his tomb identifies this man as 'Ulugh Khan-i 'Azam Khan Jahan,' suggesting he was an ethnic Turk ('Ulugh') and a high-ranking officer ('Khan-i 'Azam') in the Bengal sultanate.
The literature and the architecture of the period reveal the new ruling class's profoundly foreign—that is, non-Bengali—character. In 1626 ... journeyed to Rajmahal and wrote of encountering people whose family origins lay in Balkh, Bukhara, Khurasan, Iraq, Baghdad, Anatolia, Syria, and North India.
page 4...Shat Gumbaj Mosque or Bagerhat is one of the major signs of the Golden era of Muslim Bengal