Christian Rothenhagen, AKA deerBLN, is a fine artist and muralist who is known for conceptual, architecture-based drawings and installations of his two favorite cities – his hometown and base of Berlin and San Francisco, which he has frequently visited since the mid-1990s. He documents his personal view of these cities and their transformation, capturing moments in time with his art. He has been showing in international galleries, and a few slightly-hidden streets, over the last two decades.