Though he sometimes works monochromatically, when I first came across the ink and watercolor architectural drawings and urban sketches of French artist Jérémy Soheylian the majority of his work at first registered to my eye as full color.
It then dawned on me that they were actually remarkably effective use of simple warm and cool tones — a muted sepia (or perhaps burnt sienna) and a cool, low chroma blue-gray. Soheylian is wonderfully adept at using the power of color temperature and value relationships to suggest distance and variety, with deft touches of pen work adding texture and a sensation of detail.
He occasionally also works in more colors, greens and higher chroma red-browns and blues, but still with a very limited palette. Some of his work is more sketch like, other pieces are more refined and finished. All of them evidence solid draftsmanship and a firm grasp of architectural form.
His website is in French, but is easily navigable by non-French speakers. “Peintures” are his watercolor paintings, “Dessins” are drawings in various media including urban sketches, and “Illustrations” are his more formal architectural drawings.
Soheylian also has a blog, which includes some step-throughs of his process. It’s also in French, and has more text than his website, but you can access it through Google Translate if you want a rough translation.
There is also a step-through of his process on Canson Studio. In addition, there is a brief interview with Soheylian on the French version of the Canson Studio site, Google Translate here (scroll down).
If you do a Google Image Search, you’ll find a number of his images from other sources.
There is a brief video about Soheylian on YouTube that is in Russian, but has a view of him working.