Its territory is now part of Dibër County: the municipalities of Mat and Klos.

The district consisted of the following municipalities:[2] Mat is believed to be one of the oldest Albanian settlements, most likely as old as the 2nd-5th century AD.

[3] At the beginning of the 15th century the Lord of Matja was Gjon Kastrioti, father of Skanderbeg.

[4] When Skanderbeg began his rebellion against Ottomans he also became the lord of Mat and some other territories as well.

[5] A synod of Catholic archdiocese was held in Matja in 1462 by Pal Egnelli known for his baptismal formula.