The Thopia dynasty's principality in central Albania between the Mat and Shkumbin: Karl Thopia emerged in 1359 after killing the Despot of Epirus at the Battle of Achelous, took Durres from the Angevins in March 1368, and made his house the strongest force in Albania until the Ottomans arrived.
Durres passed to Venice on Gjergj Thopia's death in 1392; the reduced principality held on at Kruje until 1415, when the Ottomans took it into the Sanjak of Albania.
The atlas holds 3 border frames for Principality of Albania (Thopia) — the shape you scrub through changes in 1359 · 1368 · 1392.
The standard scholarly survey of the Balkans in exactly this period — the Albanian principalities, the Serbian collapse and the Ottoman conquest. (Open Library verified)
The polity-specific academic study of medieval coastal Albania — Durres, Berat and the principalities of this record. (Open Library verified)