Christina is an East Berliner who was born in the GDR, a socialist republic that no longer exists. She danced on the Wall in 1989, and closely observed the restructuring of Germany and the frantic urban transformation of Berlin. At the European University Viadrina in Frankfurt (Oder) she earned an MA in cultural history and comparative social sciences, particularly the ideology-based history of the twentieth century. Her dissertation was on a more contemporary subject of "The Economic Impact of the Contemporary Art Scene on the city of Berlin." She now works as an arts administrator, manages urban development initiatives, and since 2006 routinely walks guests through the eclectic and varied political, cultural, and architectural histories of the German capital and beyond.

Raised in New York City, Jan graduated from Williams College in 1985 with honors in the history of ideas and later went to the Harvard University Graduate School of Design to receive his MA in architecture in 1990. He has worked as an architect in Berlin since 1994. He has been a regular contributor to a wide range of publications, including The New York Times, the Harvard Design Magazine, the International Herald Tribune, Places Magazine, and the Architectural Record, writing chiefly about European architecture and urbanism. He teaches urban studies and sustainability at the IES Berlin Metropolitan Studies Program, and has served as an invited guest critic or lecturer at the Technische Universität in Berlin, the University of Warsaw Architecture School, and the Architectural Association in London. Jan is the Academic Director of the Northeastern University School of Architecture Berlin Program, where he also teaches two required seminars.

Robert grew up in East Berlin during the 1980s and went on to study at the University of Florence, Italy. He received his PhD in cultural studies from Humboldt University of Berlin where his dissertation focused on sexual violence in the Nazi concentration camps. He recently worked as a researcher for the BBC and as a historian for the Sachsenhausen and Ravensbrück concentration camp memorials. His interests range from the history of art and architecture to modern European history and WWII. Robert worked for Hampshire College and has given guest lectures at both Boston University and Brown University. He has been working as a tour guide for more than ten years.