May the Fourth
This is one of my favorite McQuarrie paintings, one I recently bought a glorious print of from Dreams and Vision Press. Not the Cloud City since introduced in Empire, it's depicting the floating Imperial Prison on Alderaan from one of the earlier drafts of Star Wars, modelled on the side of an aircraft carrier, with a few exotic buildings topping it off. Worth noticing of course are the five Colin Cantwell prototype tie fighters, and the then Millenium Falcon (known as the Pirate Ship in the scripts) getting ready to dock.
May the fourth be with you.