 Complete the following phrase:  Coinciding with the decline of the Roman Empire, many barbarian tribes passed through the Balkans, most of whom did not leave any lasting state. The Slavs, however, overwhelmed the Balkans in the 6th and 7th centuries. The Principality of Serbia included the city of Destinikon, which is mostly believed to have been in Metohija. The region was conquered by Bulgaria in the early 10th century, after which Byzantine rule was restored, briefly ca. 970-975, and again after 1018. In terms of ecclesiastical administration, the region of Metohija belonged to the Eparchy of Prizren, created in 1019. During the 11th and the 12th century, the region was contested between the Grand Principality of Serbia and the Byzantine Empire. Serbian Grand Prince Stefan Nemanja was recognized as independent in 1190, keeping northern parts of the Metohija region of Hvosno, while southern parts were incorporated into the Kingdom of Serbia by the beginning of the 13th century. After the 