Sketches of Architecture are Catching the Best Moments of the Developing Idea
The architects and designers, and all that work with art and making things beautiful (also functional in more cases) are great artists too. They catch every segment of their thought and they develop it during it. Sometimes the sketch is almost ready made project, just in several minutes. The details are added later depending on the sketch growth.
Enjoy these sketches and art in making architecture in the moment!