Romania, Serbia and Bulgaria prime ministers announced on 7th March 2014 that they would form „Craiova Group” on the pattern of „Visegrád Group” (Poland, Hungary, Slovakia, Czech Republic). Just to remember: Romania tried at the beginning of the ’90s to join Visegrád Group, but was rejected.
There are some historical similarities between the projected Craiova Group and the Visegrád Group. The common history of Poland, Hungary, Slovakia and Czech Republic during the 15th century is well-known, not so much the common history of the medieval Serbia, Bulgaria and Romania. Still, there were a lot of marriages among the ruling families of the countries near the lower branch of Danube and many instances when military cooperation existed, mainly against the Ottoman Empire.
The nowadays Visegrád Group countries fell under the rule of Hapsburg Empire by the end of the 17th century (with the exception of Hungary, it fell under Ottoman rule at the beginning of the 16th century, only to be reconquered by the Hapsburgs 200 years later). The Craiova Group countries fell under Ottoman Empire rule roughly during the same period, with different degrees of autonomy (Bulgaria and Serbia were ruled by Turks under Ottoman laws, while Wallachia and Moldova retained their own rulers and laws). In the end, the German-Hapsburg inheritance of the Visegrád Group is thought to be superior of that of the Ottoman Empire, sometimes designated as „Balkanism”.