Dan Parolek is Principal at Opticos Design in Berkley, CA. Opticos is the force behind www.missingmiddle.com, a website devoted to reintroducing the housing and building types that were ubquitous in the human scaled development era, and nearly extinct for the last 60 years. The website shows pictures and diagrams of duplexes, quadplexes, bungalow courts, courtyard housing and more.