A pigeon carrying an important message takes the reader on a unique tour through Rome. As we follow the path of this somewhat wayward bird, we discover that Rome is a place where past and present live side by side. Every time a corner is turned there is a surprise, just as every turn of the page brings a new perspective. This juxtaposition of ancient and modern, as seen with David Macaulay's ingenious vision, gives the reader an imaginative and informative journey through this wondrous city.