countoured sketches of typical buildings or art pieces

I am looking for someone to create countoured sketches of abstract art pieces, historical buildings or typical national or global icons. I need more than 7 sketches in total, with clear details and a high level of accuracy. The desired style is abstract, so I need someone with experience with this style in particular. The pieces of art can include sculptures, murals, paintings, tapestries, reliefs, etc. All the sketches must be delivered in a high quality digital format. Experience with digital vector software (Adobe Illustrator, Inkscape, CorelDraw) is an advantage.