What is in this image? Describe it as if you were explaining it to someone from the 15th century.

Imagine a scene depicting a grand city far more advanced than the realms and cities known to us. Here, the skyline showcases towering structures that reach towards the heavens, far exceeding the heights of the finest cathedrals. Among these, one building gleams like a crystal spear piercing the sky, while others boast formidable silhouettes of varying shapes and magnitudes.Beneath these giants, there lies a robust stone bridge that carries horseless carriages of metal that move without the aid of beasts, riding upon tracks elevated above the waters of a broad river. The scene also portrays smaller buildings, each unique in design, possibly houses of commerce or residences for city dwellers.Overlaid upon this remarkable cityscape are bold letters spelling "CHICAGO," which might suggest the name of this vast city. In the heavens above, clouds dot the sky, suggesting a day of fair weather and bustling activity within this modern metropolis.This illustration indeed captures a realm of architectural wonder and mechanical prowess far beyond the constructs familiar to our current age.