Perspective is a way of drawing, or rendering depth. It is based in math a the fact that parallel lines will never meet, but because of the laws governing distance. they appear to CONVERGE or meet. Below we will see 1 point and 2 point perspectives
There is also 3 point perspective, multi point perspective and ariel perspective. Foreshortening is also a form of 1 point perspective.21perspectivedesc.jpg
Above, in order is converging parallel lines, followed by 1 point perspective and then 2 point perspective.

The Sistine Chapel.

d99666306be28aa882d85b60355bb6fb.jpgSimple 1 point perspective drawing by Wayne Thiebaud. This is what Irefer to as freehand perspective as opposed to mechanical perspective where a ruler is used to plot the distance.

Fore shortened image of the Dead Christ by MantegnaAyukaSugiura09.jpg
these books are drawn in both 1 point and two point. 1 point is always a flat frontal image. 2 point always works from an angle where both sides are set from the foremost extended corner or line as in the bottom book.

Sandro Bottecelli, the Birth of Venus. the shell, the shell, the shell and the illusion of depth
the first picture is a perspective machine. It worked off of light, a grid located in a frame and plotting the image from a shadow. the second picture is a simple 1 point perspective where the point is Christ's head or right above his head. in these cases perspective becomes symbolic.perspective-presentation8.jpg
Raphael's tour deforce of 1 point perspective and portraiture. The School of Athens. there are many great people located within this painting such as Leonardo and Michelangelo and Raphael himself.
2 point shallow space and 2 point panoramic space.
3991543036.jpg 1 point to the left side383954284_0e634bf6ab.jpg 2 pointCoffee_Cocoa_Tea_(800x633).jpg 1 pointdali_03.jpg
above and below, Dali loved Perspective as it could distort images correctly, but making them seem strange or bentdali_02.jpg Galatia_of_the_Spheres_-_Dali.jpg

De Chirico used 1 point but seemed to have no horizon to place these points upon. his pictures therefore seem distorted or wrapped to an extreme dream like state. He was a Surrealist after all, so this use of multiple points works for his paintings. Like Dali he used perspective as he saw fit.
Giorgio_de_Chirico_-_Mystery_and_Melancholy_of_a_Street.jpg tumblr_lxnwno7mmT1qghk7bo1_1280.jpg TSOA_16.png
Is it perspective of a visual trick? Magritte also a surrealist used perspective and then seemed to use perspective.Magritte_1_Point_Perspective_example.jpgTSOA_15.png

the perspective here is 1 point, but it is more a freehand distance Technique rather than parallel lines seeming to converge.