Important historical periods in English literature include Old English, Middle English, the Renaissance, the Elizabethan era of the 16th century (which includes the Shakespearean era), the 17th Century Restoration period, the 18th century Age of Enlightenment, the Romanticism of the early 19th century, the later 19th Century Victorian, and 20th Century Modernism and Post-modernism. Important intellectual movements that have influenced the study of literature include feminism, post-colonialism, psychoanalysis, post-structuralism, post-modernism, romanticism, and Marxism