OK, so this last building isn't in DC; it's on the Delaware shore, where all of the Washingtonians flock to during the summer.
Washington, DC Buildings
These sketches of buildings in the Foggy Bottom and West End neighborhoods of Washington, DC, were done during my lunchtime strolls. Some were done in one session, usually no longer than 30 minutes. Others were done in ten to twenty minute sessions over the span of several days. The sketches were done with Micron pens, gel pens,and ballpoint pens, and a selection of markers into a 4" x 6" sketchbook.