Timeline of the Assyrian Empire in Ashur began deteriorating, Tukulti-Ninurta built a new capital city; Kar-Tukulti-Ninurta. He stretched the Assyrian Empire further south than before, conquering Dilmun, a "pre-Arab" civilisation of the Arabian Peninsula that encompassed modern Bahrain, Kuwait, Qatar and the coastal regions of the Eastern Province of Saudi Arabia. However, Tukulti-Ninurta's sons rebelled and besieged the ageing king in his capital. He was murdered and then succeeded by Ashur-nadin-apli (1206–1203 BC) who left the running of his empire to Assyrian regional governors such as Adad-bēl-gabbe. Another unstable period for Assyria followed, it was riven by periods of internal strife and the new king
Capital Cities and Tombs of the Ancient Koguryo Kingdom in Northeast China and later extended into the northern half of the Korean Peninsula. Some of the tombs have elaborate ceilings designed to roof wide spaces without columns and carry the heavy load of a stone or earth tumulus (mound) was placed above them. The paintings in the tombs, while showing artistic skills and specific style, are also an example of strong influence from various cultures. The tombs represent a masterpiece of the human creative genius in their wall paintings and structures. Capital Cities and Tombs of the Ancient Koguryo Kingdom Capital Cities and Tombs of the Ancient Koguryo Kingdom