 After the Franks were driven from the Holy Land in 1291 , European familiarity with the castles of the Crusades declined . It was not until the 19th century that interest in these buildings was renewed , so there are no detailed plans from before 1837 . Guillaume Rey was the first European researcher to scientifically study Crusader castles in the Holy Land . In 1871 he published the work Etudes sur les monuments de l 'architecture militaire des Croisés en Syrie et dans l 'ile de Chypre ; it included plans and drawings of the major Crusader castles in Syria , including Krak des Chevaliers . In some instances his drawings were inaccurate , however for Krak des Chavaliers they record features which have since been lost . 
 After the Franks <a href='uninflect' title='1'><mark>were</mark></a> driven from the Holy Land in 1291 , European familiarity with the castles of the Crusades declined . It <a href='negative_concord' title='2'><mark>was</mark></a> <a href='negative_concord' title='3'><mark>not</mark></a>until the 19th century that interest in these buildings was renewed , so <a href='dey_it' title='4'><mark>there</mark></a> are no detailed plans from before 1837 . Guillaume Rey was the first European researcher to scientifically study Crusader castles in the Holy Land . In 1871 he published the work Etudes sur les monuments de l 'architecture militaire des Croisés en Syrie et dans l 'ile de Chypre ; it included plans and drawings of the major Crusader castles in Syria , including Krak des Chevaliers . In some instances his drawings <a href='uninflect' title='5'><mark>were</mark></a> inaccurate , however for Krak des Chavaliers they record features which <a href='been_done' title='6'><mark>have</mark></a> since been lost . 
After the Franks was driven from the Holy Land in 1291 , European familiarity wit da castles of the Crusades declined . It ain't until tda19th century that interest in dem buildings was renewed , soo it ain't no detailed plans from before 1837 . Guillaume Rey was the first European researcher to scientifically study Crusader castles in thdaoly Land . In 1871 he published the work Etudes sur les monuments de l 'architecture militaire des Croisés en Syrie et dans l 'ile de Chypre ; it included plans and drawings of thedajor Crusader castles in Syria , including Krak des Chevaliers . In some instances his drawings was inaccurate , however for Krak des Chavaliers they record features which done since been lost .