Amoghavarsha I (also known as Amoghavarsha Nrupathunga I) (r.814–878 CE) was the greatest emperor of the Rashtrakuta dynasty, and one of the most notable rulers of Ancient India. His reign of 64 years is one of the longest precisely dated monarchical reigns on record. Many Kannada and Sanskrit scholars prospered during his rule, including the great Indian mathematician Mahaviracharya who wrote Ganita-sara-samgraha, Jinasena, Virasena, Shakatayan and Sri Vijaya (a Kannada language theorist). Amoghavarsha I was an accomplished poet and scholar. He wrote (or co-authored) the Kavirajamarga, the earliest extant literary work in Kannada, and Prashnottara Ratnamalika, a religious work in Sanskrit. During his rule he held titles such as Nrupathunga, Atishadhavala, Veeranarayana, Rattamarthanda and Srivallabha. He moved the Rashtrakuta regal capital from Mayurkhandi in the Bidar district to Manyakheta in the Kalaburagi district in the modern Karnataka state. He is said to have built the regal city to "match that of Lord Indra". The capital city was planned to include elaborately designed buildings for the royalty using the finest of workmanship. The Arab traveler Sulaiman described Amoghavarsha as one of the "four great kings of the world." For his religious temperament, his interest in the fine arts and literature and his peace-loving nature, historian Panchamukhi has compared him to the emperor Ashoka and given him the honorific "Ashoka of the South". Amoghavarsha seems to have entertained the highest admiration for the language, literature and culture of the Kannada people as testified to in the text Kavirajamarga. Early years Amoghavarsha I (whose birth name was Sharva) was born in 800 CE in Sribhavan on the banks of the river Narmada during the return journey of his father, Emperor Govinda III, from his successful campaigns in northern India. This information is available from the Manne inscription of 803 and the Sanjan plates of 871, both important sources of information about Amoghavarsha I. The Sirur plates further clarify that Amoghavarsha I ascended to the throne in 815 at the age of 14 after the death of his father. All his inscriptions thereafter refer to him as Amoghavarsha I. A revolt led by some of his relatives together with feudatories of the empire temporarily unseated Amoghavarsha I, who, with the help of his cousin (Karka) also called Patamalla, re-established himself as the emperor by 821. This information comes from the Surat records and the Baroda plates of 835. The first to revolt was the