Considerations on the Causes of the Greatness of the Romans and Their Decline: Two separate translations of Montesquieu's 1734 work of historical commentary.
De L'Esprit des Lois: Online French and English editions of the text. The English version is only available in PDF format.
Modern History Sourcebook: Spirit of the Laws: Excerpt from the first volume of Montesquieu's monumental 1748 opus.
Montesquieu: The Spirit of Laws: The complete Nugent translation, available in HTML or plain-text formats.
Oxford University Comparative Law Forum: Montesquieu in England: Essay by Iain Stewart on Montesquieu's thought in relation to England, including a full translation of his Notes on England.
Persian Letters: Text of the eleventh and twelfth letters, both from Usbek to Mirza.
Quotations by Montesquieu on Political Philosophy: Assembled quotes, without citations.