In the late 19th century, new technologies changed Lowell. The electric streetcar allowed the city to expand creating new neighborhoods on the outskirts. Tyler Park and Lynde Hill in Belvidere were home to many of Lowell's wealthiest residents, who could now live away from the noisy and polluted downtown industrial area. The prosperous city built a massive new Romanesque city hall made of granite with a clock tower that could be seen from the mill-yards. A new library with a hall dedicated to the Civil War, a post office, and ornate commercial buildings replaced the puritanical mid-century structures.