An ancient city， the destination of our journey， has traditions both apparent and invisible. Does each tile in the old city conceal layers of history just as deep? Memories sealed tightly， will they be passed on or ultimately lost? Are we， the visitors， still the same “us”? In this book， the author leads readers through a tour of 12 famous ancient cities worldwide， witnessing the visible and invisible transformations of these cities and searching for a more genuine connection between history and reality.