The Regnum Albaniae declared by Charles of Anjou in February 1272 on the Albanian coast he had taken from Byzantium, with local noble support — at first a strip from Durazzo south to Butrint, and a launchpad for his designs on Constantinople that died at the Siege of Berat (1280-81).
Reduced after 1281 to the country around Durazzo and held ever more nominally; the last Angevin stronghold fell to Karl Thopia in March 1368, ending the medieval kingdom.
The atlas holds 2 border frames for Kingdom of Albania (Angevin) — the shape you scrub through changes in 1272 · 1282.
The standard scholarly survey of the Balkans in exactly this period — the Albanian principalities, the Serbian collapse and the Ottoman conquest. (Open Library verified)
Accessible national history whose opening chapters cover the medieval kingdom and the principalities that succeeded it. (Open Library verified)