Sketches from artists whose works usually aren’t sketches are uniquely intriguing. Those from architects are perhaps the most acute case of this. To architects, sketches are process tools; fascia between design in the mind and in the real, physical world, but somehow insightfully closer to the designer than the constructed edifice.
The sketches for Architecture For Humanity’s fundraising auction are a little different in that a number of them are the intended end design. Sketches as the architect’s work of art. There are even a few three dimensional works. If you can, bid on them to support a great cause; the well known non-profit has volunteer run chapters all over, with community-benefiting projects at local, national, and global levels. If you can’t, at least check them out; the sketches and AFH.