The historical regions of Romania are located in Southeastern Europe.Romania came into being through the unification of two principalities, Wallachia and Moldavia in 1862. The new unitary state extended over further regions at various times during the late 19th and 20th centuries, including Dobruja in 1878, and Transylvania in 1918.
Wallachia, western Moldavia, and Dobruja are sometimes referred collectively as the Regat (The Kingdom), as they formed the Romanian "Old" Kingdom before World War I.