To become an architect you need to have strong perspective, design and geometric drawing skills, just to name a few, but architects really don't need to know much about drawing the human figure.
Anatomy is an entirely different realm of artistic knowledge, so illustrators who focus their energy on specialization in architectural forms tend to let their figure drawing skills fade away.
But architects still retain knowledge of drawing the human form, and often include little doodles of people in their architectural renderings to establish scale, doodles that often reflect their artistic style.
New York-based architectural designer Noor Makkiya has put together a collection of 21 drawings of the human form by famous architects, from the super simple shapes of SANAA to the sketchy geometry of Frank Gehry.
It's interesting to see how much of each architect's personal sense of style can be reflected in a simple doodle of a person, and how each artist truly has their own distinct approach to form construction.
-Via DesignBoom