What are the two components of linear perspective?

There are two components of linear perspective they are called as orthogonal and horizontal line

Rather than this two components there is also one important component which is known as vanishing point. This component also has equal important like the other two. There are 3 types of linear perspective:

1. One point perspective,  

2. Two point perspective and  

3. Three point perspective.  

There is also a multi-point perspective which has different set of vanishing points. Perspective is defined as in a graphical representation of things like building playground humans etc in an approximate manner

they were byzantines