Briefly explain one development from 1492 to 1534 not represented in "conquistadores, cs. 1534" that supports the artists point of view

there is no image for me to refer

the idealization of the rural landscape ; admiration for the beauty of nature ; focus on an individual's inner concerns

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).