What’s the difference between art and architecture? Here’s Archdaily’s Vanessa Quirk with a run of the mill definition:  Art is a form of self-expression with absolutely no responsibility to anyone or anything. Architecture can be a piece of art, but it must be responsible to people and its context.  What, then, does one make of Matthias Jung’s architectural collages? The German designer cuts up architectural features and pieces them together against ethereal backgrounds in order to create otherworldly designs. Jung’s end results—collections of doors, arches, and windows with some bricks to fill the gaps—are definitely not livable, but that won’t…