Willimantic was populated by a series of ethnic groups migrating to the city to find work at the mills, originally Western European and French Canadian immigrants, later Eastern Europeans and Puerto Ricans. Architecturally, it is known for its collection of Victorian-era houses and other buildings in the hill section, the Romanesque Revival town hall and two crossings of the Willimantic River: a footbridge and the "Frog Bridge". It is home to Eastern Connecticut State University and the Windham Textile and History Museum. As of 2010, Willimantic had a population of 17,737 people.