Last night, we returned from a two week trip to Greece. We visited Athens, Crete, and Thessaloniki. Athens and Crete are familiar American tourist destinations. Thessaloniki is not, and for good reason. It’s interesting, but not interesting enough to cause many American tourists to visit it. We went because it’s where my wife’s father was born. At that time, in the early years of the last century, Salonika (as the city was called) was one of the most fascinating cities in the world. My wife and I arrived 100 years too late. Thessaloniki, Greece’s second most populous city, is located...