Coworking spaces are on the rise, from Google’s “Campus” in London to NextSpace in California. Much has been made of these shared workspaces as a brand-new idea, one that barely existed 10 years ago. But the way they function reminds me of a very old idea: the Renaissance “bottega” (workshop) of 15th-century Florence, in which master artists were committed to teaching new artists, talents were nurtured, new techniques were at work, and new artistic forms came to light with artists competing among themselves but also working together.