Bylis (in today Mallakastra) which is a very important archeological center in Albania, is one of ancient Illyrian citys inhabited by the tribe of Bylliones. Established in the third century B.C., Bylis flourished as a political, economic, and cultural center of the community. The city was governed by an annual council of civil servants. In 230-146 B.C., it introduced bronze coins, which were used throughout this region. The handicrafts from the workshops of Bylis were competing with the handicrafts of Apollonia. The surrounding wall of Bylis, built in the second quarter of the fourth century B.C., is very well-preserved. It is 2250 m long, 3.5 m wide and 8-9 m high and it surrounds an area of 30 ha. The wall is triangular. The city consisted of several quarters and objects, such as the agora, which sheltered the inhabitants of the villages and their wealth in the event of war. It is very interesting to see:
The theatre,which is larger than that of Butrint and was built in the middle of the third century B.C.
The monumental fountain of the 3rd century. - Several stadium elements. - Medieval cultural objects such as Basilica
In the Church of Bylis which was build on the IV-th century AD, the mosaics have Ilirian (Illyrian) motifs which for the church later where known as pagan ones