US President Barack Obama (R) walks from the Propylaia with Eleni Banou, Ministry of Culture director of Ephorate of Antiquities for Athens, during a tour of the Acropolis on November 16, 2016 in Athens, Greece. Obama will sketch out his vision of democracy at a time of mounting global populism, seeking to soothe European allies anxious over a Donald Trump presidency. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)