Leonardo designed many machines hundreds of years in advance of their time, machines that were perfectly designed except for the fact that they lacked a means of .

the style of music that was composed during the classical era was concerto grosso.

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.