Lanquais, Dordogne, France by Linda Vanysacker
How Architecture Is Born: 8 Pencil Sketches by Tom Kundig and the Buildings They Helped Create - Architizer
Hutong Pencil Drawings - does this count?
from The Art of Pencil Drawing
Matthias Church in Budapest, pencil architecture sketch by Krystian Woźniak from Poland.
colored pencil sketches
Random Pencil Sketches by Behzad Rashidizadeh, via Behance