Between 1850 and 1950, Boston’s Jewish population grew and flourished in primarily seven neighborhoods that evolved over time. Before World War I, immigrants arrived in multiple waves and settled first in the South End, then in the North End, West End, and East Boston. They moved on to new, less crowded neighborhoods when they could afford to do so. Boston’s Jewish population reached its height of 115,000 people with over 50 synagogues in the 1930s. Boston’s Jews defined a new American identity that balanced older traditions with new world expectations and opportunities. Together they wove a tapestry of religious, educational, and community activities based upon historical values, dreams, and resources of the new world. They left a legacy of education, philanthropy, and culture that continues to thrive and renew itself today.