Regulamentul Organic, a quasi-constitutional organic law is adopted in Wallachia, one of the two Danubian Principalities that were to become the basis of Romania.

Regulamentul Organic was a quasi-constitutional organic law enforced in 1831–1832 by the Imperial Russian authorities in Moldavia and Wallachia. The document partially confirmed the traditional government, including rule by the hospodars, and set up a common Russian protectorate which lasted until 1854. The Regulament itself remained in force until 1858. Conservative in its scope, it also engendered a period of unprecedented reforms which provided a setting for the Westernization of the local society. The Regulament offered the two Principalities their first common system of government.