heart of the city, a royal palace was built that also served as a temple. Four successive architectural levels from the second kingdom's palace have been unearthed (the oldest is designated P3, while the latest is P0). The last two levels are dated to the Akkadian period. The first two levels were excavated; the findings include a temple (Enceinte Sacrée or Sacred Enclosure) dedicated to an unknown deity, a pillared throne room, and a hall with three double wood pillars leading to the temple. Six smaller temples were discovered in the city, including the temple called the Massif Rouge (unknown dedication), and temples dedicated to Ninni-Zaza, Ishtarat, Ishtar, Ninhursag and Shamash. All the temples were located in the center of the city except for the Ishtar temple; the area between the Enceinte Sacrée and the Massif Rouge is considered to have been the administrative center of the high priest. The second kingdom appears to have been a powerful and prosperous political center, its kings held the title of Lugal, and many are attested in the city, the most important source being the letter of king Enna-Dagan c. 2350 BC, which was sent to Irkab-Damu of Ebla,. In it, the Mariote king mentions his predecessors and their military achievements. However, the reading of this letter is still uncertain and many interpretations have been presented by scholars. Mari–Ebla war The earliest attested king in the letter of Enna-Dagan is Ansud, who is mentioned as attacking Ebla, the traditional rival of Mari with whom it had a long war, and conquering many of Ebla's cities, including the land of Belan. The next king mentioned in the letter is Saʿumu, who conquered the lands of Ra'ak and Nirum. King Kun-Damu of Ebla defeated Mari in the middle of the 25th century BC. The war continued with Išhtup-Išar of Mari's conquest of Emar at a time of Eblaite weakness in the mid-24th century BC. King Igrish-Halam of Ebla had to pay tribute to Iblul-Il of Mari, who is mentioned in the letter, conquering many of Ebla's cities and campaigning in the Burman region. Enna-Dagan also received tribute; his reign fell entirely within the reign of Irkab-Damu of Ebla, who managed to defeat Mari and end the tribute. Mari defeated Ebla's ally Nagar in year seven of the Eblaite vizier Ibrium's term, causing the blockage of trade routes between Ebla and southern Mesopotamia via upper Mesopotamia.