[3][4] In an act of Robert, King of Naples in 15 April 1338, Tanusio was mentioned as Count of Mat (conte di Matia),[5][6][7] which reconfirmed Thopia's relations to the Angevins from the time of Philip I.

However except for Andrea Muzaka who defeated the Serbs in a battle in the Peristeri mountains, no action was taken to realize the treaty with the Angevins.

Karl forged close ties with Venice and gained their support, who recognized him as Prince of Albania.

[19] Balša II made a fourth attempt to conquer Durrës, which had become an important commercial and strategic center.

In 1385, the defeated Karl Thopia, appealed to Murad I for support against his rivals, the Balsha noble family of the Principality of Zeta.

This attempt caused an Ottoman force, led by Hayreddin Pasha, to quickly march into Albania along the Via Egnatia.

Due to the growing power of the Ottomans, the pressure from the Balsha noble family in the north and Gjergj's illness, Thopia rule was on the verge of collapse.

Thus, Venice was concerned about Durrës falling into the hands of the Ottomans and made immediate plans to take it over through diplomatic means.

Helena was married to a Venetian nobleman, Marco Barbarigo, who resided in Krujë and was the de facto ruler the possessions of Thopia.

[23] After the Battle of Ankara and subsequently the death of Bayezid I, many Albanian lords recognized Venetian suzerainty instead of Ottoman, such Koja Zaharia, Dhimitër Jonima and various members of the Dukagjin family.