sentence: on the ground floor , the display of bow and arrow in the first room is followed by sections containing the weapons and other regalia of the cavalry , curved dagger and lancet carried by foot soldiers in the 15th century , 17th century copper head armor for horses and ottoman shields carried by the janissaries , and sections devoted to selim i , mehmet the conqueror , the conquest of istanbul , weaponry from the early islam , iran , caucasia , europe and turkish periods .