Upon the death of King Vjenčislav, Kazimir became King of Tzepam. After a 23 year reign(345-367) He was succeeded by his son Zdeslav Kazimirzović(b. 353), who united the Principality of Zau, and the Priestdom of Kalsej into the Kingdom of Tzepam, making Zau his capital. He established a written law, national religion, and created the Vjed Posjeda<Council of Estates> made up of representatives of feudal domains, ecclesiastical lands, and city councils as a pseudo-parliament.
By the year 433IO the Tzepami Nation boasted 15,000,000 people and was 1.8 million km2 in size. In 434IO Zdeslav passed away and with him, the Užánov dynasty. After a brief succession crisis, the Vjed Posjeda passed a proto-constitution, and with it established an elective monarchy. A king would be elected after his predecessor's death. He would rule has head of the Faith, Chief Diplomat, Leader of the Vjed Posjeda, and Commander of the newly institutionalized Vojska Králja Tzepamski<Royal Tzepami Military>. The first man elected king was Výtautas Michailović Skanjež, a Kol-te nobleman. This began the Pax Tzepama, a golden age of scientific advancement, economic expansion, artistic representation, and relative peace in the region which would last over 300 years, eventually ushering in the early modern era.