Orientalis

Orientalis, oriental in Latin, may refer to : and also:
 * a Yersinia pestis biovar thought to correspond to the third plague pandemic
 * Francia Orientalis, the realm allotted to Louis the German by the 843 Treaty of Verdun
 * Marcha Orientalis, the Latin name for the (Bavarian) Eastern March, that became the Margraviate of Austria
 * Marcha Orientalis, the Latin name for the Saxon Eastern March
 * Opera Orientalis, a military intelligence operation carried out during the Yugoslav Wars in August 1991
 * Patrologia Orientalis, an attempt to create a comprehensive collection of the writings by eastern Church Fathers in Syriac, Armenian and Arabic, Coptic, Ge'ez, Georgian, and Slavonic
 * Terra orientalis (Osterland), a historical region in Germany situated between the Elbe and Saale rivers to the north of Pleissnerland