There was technically only one Vera City. However, with the way it was built, there were actually two more citadels and two more wing cities in this territory making a total of five partitions.
It was made like this because they don't want to waste the five strategically important locations across the mountain ranges that were closely linked together. It is such a waste to ignore the advantage of their location so Vincent and Luna modified their city plans accordingly.
The central city had two layers separated by the outer wall and the inner wall.
The outer wall was 20-meter tall while the inner wall was 30-meter tall.