Analysis of information sources in references of the Wikipedia article "Butrint" in English language version.
Lower Chaonia utilized the port of Onchesmos (modern Hagioi Saranta) and Bouthrotos
The north-west Greeks occupied a large area, extending in the west from the Gulf of Ambracia to the Gulf of Oricum ... The main groups from south to north were called Thesproti, Athamanes, Molossi, Atintanes, Chaones, Parauaei, ...
Bouthrotos, which is situated on a hill on the bank of the lake of the same name, was laid out in the fifth century around an acropolis dating from the seventh century B.C. The walled area at the highest part of the hill, measuring 600x150 m. was ... The agora with its stoas, theatre etc. was organised in a separate, also fortified area.
The early years of the Second Peloponnesian War ... fortification wall in Epirus-, and it is evident that Bouthrotos, an independent city in the time of Hekataios, was made subject to Kerkyra.
manumission inscriptions at Butrint, where the names of slaves manumitted are almost all Greek, confirm this...family members
The list of thearodokoi of Delphi in the middle of the second century34 confirms that at this period Bouthrotos was the centre of an independent state which was visited by the theoroi
"At Bouthrotos, it is enough to compare the theatre, built of grey poros, with all the Roman structures surrounding it: the skene and the neighbouring buildings, the new sanctuary of Asklepios and the areas next to it
The foundation of the theme of Nikopolis also marked the end of the transitional period associated with the Slavic invasions and settlements... only two of the old cities have survived -Hadrianoupolis, ... and Bouthrotos, for which we possess exiguous but sufficient evidence of continuity and survival.
The episodic investment in defending Butrint as a town in the 13th and 14th centuries shows it still possessed an active urban population. Paradoxically not one urban dwelling has yet been identified. These, we may surmise, were concentrated on the slopes of the northern citadel, and perhaps on the steep south-facing lower slopes of the acropolis... In all probability the town had been dwindling in size sine the tumultuous unrest in the region during the later 14th century. Moving the bishopric to Glyki in 1337/38, however, removed a powerful urban institution, and with increasing Ottoman pressure to capture the important fishing here..."
... Parga, Vonitza, Preveza, and Butrinto. In 1401 the peoples of Parga had established the precedent of colluding with Venice by placing themselves voluntarily under Venetian protection, thus staying the advance of the Ottomans. ... These territories came to be known for their staunch support of the Greek revolutionary cause, and Parga colluded with the independent Orthodox peoples of Souli in their chronic battles with Ali Pasha.
First it was isolated in a no mans land on the southern border of the new republic of Albania in a largely Greek-speaking territory.