Balance- This poster is an example of symmetrical Balance using color and placement. The reds and blues are balanced vertically on either side of the page, while the triangular shapes are balanced diagonally in a reversed fashion on both sides.
Times New Roman by Pedro Javier Arbelaez. This poster in particular is a favorite of mine. I assume this poster goes through the history of Times New Roman. What's great is that Times New Roman is the only typeface used here.