|map dated pre-1919|
These are some great maps, I am currently looking for more older maps with details of the land of Transylvania. Of, course the older the map the more information you will need to know about the area in question. In this case if you look at the map above, you will see that "vallachia" ( it is also written as Wallachia) is in pink. At the very top of this is the Principality of Moldavia. The light green below is Bulgaria and the darker the Kingdom of Serbia.
Interestingly, the country of "Romania Trachi" is below Bulgaria. Transylvania is in yellow.
As for the others, the top map is the pre-1919 borders of Europe. and the Middle is a more detailed map of Siebenburgen or Transylvania.