Dorchester is Boston's largest neighborhood and also its oldest, founded a few months before the city itself. The neighborhood's historical diversity is exhibited in its architecture, from the old Victorian homes of wealthy Bostonians to the multi-family dwellings of later groups of immigrants. Today, Dorchester retains its diversity. Its main thoroughfare, Dorchester Avenue, connects many close-knit neighborhoods and thriving commercial districts of all kinds. Dorchester is also home to the University of Massachusetts at Boston and the John F. Kennedy Library.