What is van gogh's drawing style?

Van Gogh was known for his thick application of paint on canvas, called impasto. An Italian word for “paste” or “mixture”, impasto is used to describe a painting technique where paint (usually oil) is laid on so thickly that the texture of brush strokes or palette knife are clearly visible.

Van Gogh was a  post-impressionist painter.

Explanation:

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.