abstract
architecture
building
city
cityscape
concept
conceptual
construction
continuity
continuous
continuous line
contour
contour line
design
doodle
drawing
drawn
estate
graphic
hand drawn
home
house
icon
illustration
isolated
isolated object
line
line art
line drawing
logo
minimalism
modern
one
one line
outline
property
sign
silhouette
simple
simplicity
single
single line
sketch
skyline
style
symbol
urban