Like many manufacturing cities, Manchester suffered a reversal of fortune when the textile industry that fueled its economy collapsed in the 1930s. Along the Merrimack River, mills that once churned out a half-million yards of cloth each week fell into disrepair. But Manchester, the largest city in New Hampshire, has reinvented itself. In brick factory buildings that once housed thousands of spindles and looms, new tenants have arrived: high-tech companies, start-ups, restaurants, arts groups, small museums, even a science center. The city, just an hour from Boston, also has vibrant sports, cultural, and dining scenes. And it has retained its ethnic diversity, a reflection of the days when immigrants from around the world flocked here to work in its mills. Skillfully combining old and new, Manchester has preserved the best of its past while blossoming into a thoroughly modern city.