They therefore became involved in political and dynastic rivalries. The announcement reportedly helped calm fears of dynastic instability over the line of succession. Traditional Chinese historiography describes history in terms of dynastic cycles. More emphasis was put on the oversight of imperial publications such as dynastic histories. This kind of dynastic succession is an example of continuismo. Vietnam, weakened by dynastic feuds and the wars with Champa, quickly succumbed. During the early dynastic period kings had three titles. After a series of dynastic wars, the House of Luxembourg gained the Bohemian throne. It is based on the old imperial examination system used in dynastic China. The earliest ziggurats began near the end of the Early Dynastic Period. Chinese history is traditionally represented in terms of dynastic cycles. The palace came into existence during the Early Dynastic I period. He seized power during a dynastic power struggle. The Ming palace was to the south of the Yuan dynastic palace. Catherine looked to further Valois interests by grand dynastic marriages.