The Northern Wall of the Ara Pacis
The North wall of the Ara Pacis is a relief of a procession of Senators. All of the Senators are wearing togas and a laurel wreath (the symbol of Victory). Some of the Senators are carrying olive branches in their hands as an allusion to peace. This relief is also notable for the depicted children. The northern wall is not as symbolic as the eastern and western walls and was probably more of an Augustan nod to the aristocracy of the day. Not much distinguishes this wall from the southern wall either--the imperial family is portrayed no differently than the senatorial class.
Middle of Senatorial Procession
Notice the friendly conversation the two senators depicted are having. This theme of informality can be found throughout both the Northern and Southern Friezes. The Ara Pacis is the first known stately artwork that portrays the ruling class in a less than serious manner.
Detail view of an olive branch meant to represent the Pax Augusta being held by a senator.
Detail view of a box being carried by a senator towards the religious ceremony. While sufficient evidence was not found, the box would most likely contain an offering of some sort to be made at the Ara Pacis.