Sher Shah constructed Qila Rohtas to block Emperor Humayun's return to <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-comIndia</st1:place> after defeating him in the Battle of Kanauj.The other reason was to suppress the local tribe of this region Potohar called Gakhars [READ: Kianis/Rajas] who were allies of Humayun and refused their allegiance to Sher Shah Suri. The Emperor instructed the local Janjua Rajput [READ: Raw Agents :P] tribe to help construct the fort to crush the Gakhars when the latter became openly defiant and persecuting labourers who attended the construction.
Rohtas Fort is an outstanding example of early Muslim military architecture in the Indian subcontinent which incorporates features from elsewhere in the Islamic world. It also had a profound influence on the development of architectural styles in the Mughal Empire (and hence on the European colonial architecture that made abundant use of that tradition). There are no surviving examples of military architecture of this period on the same scale in the sub-continent which survive to the same degree of completeness and conservation. Fatehpur Sikri (<st1:country-region w:st="on"><st1:place w:st="on">India</st1:place></st1:country-region>) which is already on the World Heritage List represents the full Mughal realization of a form and style that owes everything to its precursor, Rohtas Fort.
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com</st1:place>Kashmir for a rest. He said the following about its location: " This fort was founded in a cleft and the strength of it cannot be imagined".
Sher Shah Suri died before the completion of this magnificent structure. Ten years after Sher Shah’s death and the end of the Suri dynasty, Emperor Humayun returned to rule <st1:country-region w:st="on"><st1:place w:st="on">India</st1:place></st1:country-region> for another 15 years. When Humayun returned the Governor of Rohtas, Tatar Khan Kasi fled. Ironically, Rohtas then became the capital of the Gakhars, the very people it was designed to crush.
Source: Wikipedia Rohtas Fort Page - Note: All photos taken while driving Jeep !