Lawrence is located along the Merrimack River in Essex County, about 25 miles north of Boston. It was built in the 1840s as the first planned industrial city in the USA, taking advantage of water power to run mills streching along the river and adjacent canals. By the early 20th century, Lawrence was a world leader in the production of cotton and woolen textiles. Lawrence's economy remains about 35% based on manufacturing. Textile, apparel, and shoe companies have been joined by technology, health care, and diversified manufacturing firms. A magnet for immigrants since its founding, Lawrence now has large Hispanic and Southeast Asian communities. Efforts have been made in recent years to renovate the city's massive mill buildings in the central area. Composer and conductor Leonard Bernstein was born here in 1918.