Special Students: Post-baccalaureate students who wish to study at Harvard, but are not enrolled in the Graduate School, may apply for Special Student status. For more information, see "Special Students" under Non-Degree Programs at the Graduate School of Arts and Sciences.
Visiting Fellows: Individuals holding a doctoral degree (or equivalent academic or professional experience), as well as ABD doctoral candidates, may apply for Visiting Fellow status to pursue independent research at Harvard. Please see "Visiting Fellows" under Non-Degree Programs in the Graduate School of Arts and Sciences.
Continuing Education: The Harvard Extension School offers open-enrollment courses (credit or noncredit) in the evening and online, including classes in Latin, ancient Greek, and classical literature and culture (current course listings). Classics courses may also be counted toward degree programs in the Extension School.
edX: Professor Gregory Nagy, along with a group of scholars, runs a massive open online course (MOOC) through HarvardX on The Ancient Greek Hero.