For tonight, I take you to two "lost" cities, because they were deserted or replaced with another one, but their stories are windows on chapters of human history. First we will go to Mycenae, a city-state and palace from the second millenium BC, that represents well the rise of Bronze Age palatial culture in Greece, long before the more familiar periods of Classical or Hellenistic Greece. Then we will move to Mesoamerica and discover the history of Tenochtitlan, the capital of the Aztec Empire. Tenochtitlan was a marvel of urban planning and engineering, built on an island on lake Texcoco, just where Mexico City now is. With around 200,000 inhabitants, it was one of the largest cities in the world in the 15th century, until its fall to the Spanish Conquest of Mexico.