Warfare in Europe in the middle ages underwent a marked change of emphasis as urban life expanded. The concentration of wealth represented by a city was a valuable objective, and the static nature of a siege was infinitely preferable to the uncertainties of campaign. As the incidence of sieges increased, so pitched battles declined. The studies in this book, intended for specialists as well as general readers, follow the history of siege warfare, exploring the urban milieu within which it developed, and the evolution of siege technology up to the advent of gunpowder weaponry. Medieval cities are temporary dwellings for travelers, how can we consider our current city? What is the significant of travel?