Some incredible sketches over at Kaid Benfield's NRDC blog courtesy of Dhiru Thadani and his forthcoming book . A few of my faves:
But it's super green-ish-esque...
Shutup ET...we're told what we should want
And included if for no other reason than just a great sketch of Piazza Navona, its large but still human-scale and the memories it recalls from living less than a five-minute walk from there.