Elara (over 64 years of age) in single combat, described in the Mahavamsa. The Ruwanwelisaya, built by Dutugemunu, is a dagaba of pyramid-like proportions and was considered an engineering marvel. Pulahatta (or Pulahatha), the first of the Five Dravidians, was deposed by Bahiya. He in turn was deposed by Panaya Mara who was deposed by Pilaya Mara, murdered by Dathika in 88 BCE. Mara was deposed by Valagamba I (89–77 BCE) which ended Tamil rule. The Mahavihara Theravada Abhayagiri ("pro-Mahayana") doctrinal disputes arose at this time. The Tripitaka was written in Pali at Aluvihara, Matale. Chora Naga (63–51 BCE), a Mahanagan, was poisoned by his consort Anula who became queen. Queen Anula (48–44 BCE), the widow of Chora Naga and of Kuda Tissa, was the first Queen of Lanka. She had many lovers who were poisoned by her and was killed by Kuttakanna Tissa. Vasabha (67–111 CE), named on the Vallipuram gold plate, fortified Anuradhapura and built eleven tanks as well as pronouncing many edicts. Gajabahu I (114–136) invaded the Chola kingdom and brought back captives as well as recovering the relic of the tooth of the Buddha. A Sangam Period classic, Manimekalai, attributes the origin of the first Pallava King from a liaison between the daughter of a Naga king of Manipallava named Pilli Valai (Pilivalai) with a Chola king, Killivalavan, out of which union was born a prince, who was lost in ship wreck and found with a twig (pallava) of Cephalandra Indica (Tondai) around his ankle and hence named Tondai-man. Another version states "Pallava" was born from the union of the Brahmin Ashvatthama with a Naga Princess also supposedly supported in the sixth verse of the Bahur plates which states "From Ashvatthama was born the king named Pallava". There was intense Roman trade with the ancient Tamil country (present day Southern India) and Sri Lanka, establishing trading settlements which remained long after the fall of the Western Roman Empire. It was in the first century AD where Saint Thomas the Apostle introduced Sri Lanka's first monotheistic religion, Christianity, according to a local Christian tradition During the reign of Mahasena (274–301) the Theravada (Maha Vihara) was persecuted and the Mahayanan branch of Buddhism appeared. Later the King returned to the Maha Vihara. Pandu (429) was the first of seven Pandiyan rulers, ending with Pithya in 455. Dhatusena (459–477) "Kalaweva" and his son Kashyapa (477–495) built the famous Sigiriya