There were close relations in the Medieval times when both countries (well Romania was split in 3 voivodeships) fought Turkye to preserve their independence. As Bulgaria fell under Ottoman rule at the end of the 14th century, Romanians finally earned their independence from Turks in 1878 while fighting them on Bulgarian soil. However after interviening in the Balkan Wars (1913) against Bulgaria and in favor of the other Balkan countries, Romania was given southern Dobrogea, which fueled Bulgarian strong feelings against Romania until 1940 when that territory was given back to Bulgaria. Apart from some rivalry that exist as between neighbours, at present day it seems the relations tend to get closer as both countries have same political objectives like successful integration in EU.