English: Four german maps showing history of Central Europe 9-th to XIII-th centuries. These maps showing that the theory of the "vanishing for a thousand years" of Albanian and Eastern Romance languages ​​expressed by Eduard Rösler in Romänische Studien: untersuchungen zur älteren Geschichte Rumäniens ("Roman studies: investigations into the ancient history of Romania"), Leipzig, 1871, is not unanimously accepted by all publishers, even Germans. There are three theories about this question, which have arguments and may be sourced from academic books:

• this first, nicknamed «Avarenwüste» («desert of the Avars»), expressed by Rössler and by Béla Köpeczi (dir. ), Erdély rövid története ("Abridged History of Transylvania"), Akadémiai Kiadó, Budapest 1989, ISBN 963 05 5901 3, asserts that the Avars and the Carolingians, by opposing each other, chased out of the northern low-danubian basin all sedentary populations, so that upon arriving, the Magyars found a demographic and politics void in this region; in this theory, the Romance-speaking populations disappeared on the north of the Danube in the 3rd century and did not reappear before the 13th century, in any case not before the Magyars;
• a second, expressed by books like История на България (“History of Bulgaria”) volume III, Sofia 1982 or Ivan Duychev's Идеята за приемствеността в средновековната българска държава (“The idea of ​​continuity in the State medieval Bulgarian"), in: Проучвания върху средновековната българска история и култура ("Studies on Bulgarian medieval history and culture"), Sofia 1981, pp. 74–78, asserts that there were no Romance-speaking populations on the southern low-danubian basin before the 13th century, these surviving only on the north of the Danube after the withdrawal of the Roman Empire in the 3rd century, so that upon arriving, the Slavs found Thracian but no romance populations in the Balkans, in any case not before their arrival;
• a third, expressed by books like Rumen Daskalov, Alexander Vezenkov, Entangled Histories of the Balkans - Shared Pasts, Disputed Legacies Vol. III in Balkan Studies Library, Brill 2015, (ISBN 9004290362), or Alexandru Avram, Mircea Babeş, Lucian Badea, Mircea Petrescu-Dîmboviţa and Alexandru Vulpe (dir.), Istoria românilor: moştenirea timpurilor îndepărtate (“History of the Romanians: the heritage of ancient times”) vol.1, ed. Enciclopedică, Bucharest 2001, (ISBN 973-45-0382-0) or also History of Romania, Romanian Cultural Institute 2005, pp. 59–132, ISBN 978-973-7784-12-4, asserts that the Romance-speaking populations never stopped their pastoral transhumance between the north and the south of the Danube since the end of the 3rd to the beginning of the 13th centuries and after that.
  Wikipedian contributors do not have to decide what is the right one between these three theories, nor to proclaim that one of them is serious and the other two imbecile and in bad faith, but to describe all three.
  In all cases, even if the arguments of the three theories were worthless, the insufficiency of evidence does not constitute proof of absence, nor of presence. In any case, it is a nonsense to imagine that a linguistic group could disappear for a thousand years and then reappear, and that this group would be the only one not to be able to cross the Danube, the Balkans and the Carpathians, while the Goths, Slavs, Avars, Proto-Bulgars, Magyars, Pechenegs, Cumans, Alans, Mongols and Ottomans did it. Although the militant contributors engage editing wars to sometimes mention it, sometimes erase it, one fact remains and constitutes in itself the irrefutable evidence of linguistic continuity between the end of the 3rd and the beginning of the 13th centuries: the Eastern Romance languages exist on the north and the south of the Danube.
  These controversies and this mutual denigration prove Winston Churchill right who said: « The Balkan region tends to produce more history until it can consume it ».