P'artaw was established as the capital in 448.[9] It was later named Perozabad when Peroz rebuilt the city. The city underwent another name change with Kavad I fortified the city and called it Perozkavad ("victorious Kavad").[10] At this time P'artaw was highly prosperous and a powerful stronghold sometime in the 5th century. Kabala, the former capitol, still maintained some importance, and it later became a see of a bishop.