In 639 Salona was destroyed by the Avars. After the fall of Salona and the whole region under the Avarian rule (first quarter of 7th century), worship of Salona's martyrs was moved to Rome. Namely, Pope John IV ordered transportation of parts of their relics, which he placed in a dedicated chapel close to the Lateran baptistry. The images of those saints, which had been created in mosaic by the Pope's wish, can be found today in the apside of the chapel. Search for relics for Rome was probably the incentive for Salona residents who inhabited the new city of Split, located only a few kilometers from the abandoned Salona. At the very least, they wanted to bring to Split the bones of their most important protectors: St. Domnius and St. Anastasius. They placed them in what was once Diocletian's mausoleum, which was subsequently converted into the Cathedral of Saint Domnius.