Stanford Encyclopedia of Philosophy. Dynamic encyclopedia that is still a work in progress. Maintained and kept current by a group of experts, this is a project of the Metaphysics Research Lab at Stanford.
Grove Encyclopedia of Classical Art and Architecture (online through OhioLINK)
The Grove Encyclopedia of Classical Art and Architecture spans every art form, medium, and civilization the fall of the Roman Empire, The Grove Encyclopedia of Classical Art & Architecture is a comprehensive reference source on this important field of study. Drawing on the expansive scholarship of The Dictionary of Art (1996, 34 vols) and Grove Art Online, and adding dozens of new entries, the Encyclopedia includes all subject areas in the classical arts, including philosophers, rulers, writers and artists, architecture, ceramics, sculpture, and more.