Best Bets for French
Not sure where to begin? Try these first.
The ARTFL Project is a full-text database consisting of over 2700 French language texts from the 13th to the 20th centuries including texts in literature, philosophy, arts, and sciences. The database includes texts by French women writers, Provençal poetry, Diderot and d'Alembert's Encyclopédie, French dictionaries from the 17th - 20th centuries, and Bayle's monumental Dictionnaire historique et critique (5th edition, 1740).