Grand Principality of Serbia, also known by anachronistic exonym as Rascia, was a medieval Serbian state that existed from the second half of the 11th century up until 1217, when it was transformed into the Kingdom of Serbia. After the Grand Principality of Serbia emerged it gradually expanded during the 12th century, encompassing various neighbouring regions, including territories of Raška, modern Montenegro, Herzegovina, and southern Dalmatia. It was founded by Grand Prince Vukan, who initially served as regional governor of the principality, appointed by King Constantine Bodin. During Byzantine-Serbian wars Vukan gained prominence and became a self-governing ruler in inner Serbian regions. He founded the Vukanović dynasty, which ruled the Grand Principality. Through diplomatic ties with the Kingdom of Hungary, Vukan's successors managed to retain their self-governance, while also recognizing the supreme overlordship of the Byzantine Empire, up to 1180. Grand Prince Stefan Nemanja (1166–1196) gained full independence and united almost all Serbian lands. His son, Grand Prince Stefan was crowned King of Serbia in 1217, while his younger son Saint Sava became the first Archbishop of Serbs, in 1219.

Zachlumia or Zachumlia, also Hum, was a medieval principality located in the modern-day regions of Herzegovina and southern Dalmatia. In some periods it was a fully independent or semi-independent South Slavic principality. It maintained relations with various foreign and neighbouring powers and later was subjected to Kingdom of Hungary, Kingdom of Serbia, Kingdom of Bosnia, and at the end to the Ottoman Empire.