Paul Cartledge (b.1947) is Professor of Greek History, the AG Leventis Professor of Greek Culture and a Fellow of Clare College, Cambridge. He also holds a visiting Global Distinguished Professorship at New York University. Cartledge is a world expert on Athens and Sparta in the Classical Age and was chief historical consultant for the BBC TV series The Greeks and the Channel 4 series The Spartans . His most recent books include Ancient Greek Political Thought in Practice (2009) and Ancient Greece: A History in Eleven Cities (2009). He is also honorary citizen of (modern) Sparta.
Georg Gerster (b.1928) is a pioneer in aerial photography. For over forty years he has taken breath-taking pictures of mountains, coasts and spectacular archeological sites in 111 countries on all continents. Based near Zurich, Switzerland, he also works as a journalist, and is a regular contributor to the Neue Zurcher Zeitung and National Geographic .