We can name the City of Singai and Nallur as those which had the honour of being the capital during the reign of Aryan emperors. When ‘Naga Arasargal’ (Naga Kings) were ruling, Kandharodai which was called ‘Kadhiramalai’, was enjoying the Rajdhani status. Those who rose up to that status afterwards ere these cities mentioned above- The cities of Singai and Nallur. It is evident that regarding these cities some confusion is prevailing amidst the historical researchers.One set of them are of the opinion that both those places are one and the same. But, the other set believe that both those two cities were separate and both of them enjoyed the status of Rajdhanis in two different period of time. As per Dr.C.K.Sitrambalam, Nallur and the City of Singai are but one and the same. 'Generally, it can be said that Nallur was also called the City of Singai '(Article - Ceylon Kingdom - Eela Murasu,Canada, 25.2.94). From the proof provided by fr.Queroz , a note is there speaking of a well-fortified place named Chunguinayanar, that is Singai City, on the way from the shore to Nallur. And, it is this place which is the Singai City or Nallur that appear in Tamil Books, Kottagama Tamil charter and the stone inscriptions of Tamilnadu (Eela Murasu 11.3.94). Kailaya Malai which was believed to have been written by one Muthukkavirasar by the end of the 16th Century, or in the beginning of the 17th century, tells us of the history of Singai Ariyan I making Nallur as the capital of his empire. According to Swami Gnanaprakasar, Mudaliar-Se.Rasanayagam, Dr. K.S.Natarasa and such others, Nallur and the city of Singai are two different cities. 'Historians claim that in Ceylon the reign of Arya Emperor had come into being in 13 A.D. And those kings of that Empire acquiring the titles Segarasasekaran, Pararasasekaran one after another, ruled the country from the City of Singai for a while, and afterwards from Nallur..', (K.S.Natarasa’s Ceylon Tamil’s Literary Growth and Development. Page.6) 'Unaware of Parakramabagu’s evil design Shenbagaperumal went to Jaffna and,
as the old capital was destroyed, established a new city in Nallur in 1450 A.D. and with the Sinhalese title Srirangabodhi Bhuvanesubagu, ruled for Seventeen years...'(Mudaliar Rasanayaka’s ‘The History of Jaffna’, page 75). In the book ‘Yaazhpaana Vaibava Maalai ‘which was written on the basis of such works as Kailayamaalai and Vaiyapaadal, Mayilvaganappulavar himself says that Singaiaariyaarasan (The first aryan king) established the capital of his kingdom in Nallur itself. Of these two different view points prevailing about Nallur and Singainagar the contention of such people as Swami. Gnanaprakasar, Mudaliar Se.Rasanayagam, and Ka.Se. Natarasa that Nallur and the City of Singai were two different cities has acceptability. And, for this the following reasons can be given.

1)In a stone-cutting that was found in a place called Kottagama in Kekalai the following is inscribed.(“kangganamver kanniyanaiyar kaatinar kamar valaip pongoli neerch singai nagarariyar” ) In this ‘Venba’ (a species of verse form), of the phrase that glorified as ‘pongoli neerch singai nagarariyar ‘ (‘ Ariyar of singai City of thundering towering water).

Se. Rasanayagam has this to say: ‘.. It is this Ukkirasingam who had paved the way for the enhancement of Singai Nagar as the Rajdhani for many Aryan emperors successively. As it is glorified as (@’pongoli neerch singai nagar’) , it becomes evident that Singai nagar was the ocean banks filled with the sound of waves. And the place so situated was established beyond doubt with the help of those very many buildings constructed in Aryan style of architecture which lie hidden under the sand along the seashore of the Temple of Vallipura and also those very many signs that were found in that area..'. (The History of Jaffna 235- 236) Swami Gnanaprakasar’s perception is also the same.

2)The well-known muslim traveller ‘Ibin Bathootha’, in his notes had called the Aryan king as the Sultan of Srilanka and had spoken of the king as having a naval force with a lot of ships. And the aryan kings who had strong naval force must have established their capital close to the port only. Seen in this light Vallipuram is a better port,stronger city than Nallur. Kailayamaalai calls Nallur as Nallaimoodhoor. This tells of the past glory and ancientness of Nallur. We can see that during the reign of first Rajendra Chola itself Nallur was a place of pilgrimage with temple. Dr. K.  Indirabala had already under-taken various research works regarding the stone-cutting of Rajendra Chola the First of this Dr. Si.Su. Sitrambalam says the following: “In this stone-cutting ‘Santhan’ is shown as one who had given various charities. The animals that he had given away to the Hindu temple situated in Nallur are recorded in this”. (Sinthanai-Jaffna University Literarypublication Department of Arts and culture July 1984, page 121). And, it is doubtful whether Nallur which was already having past glory and name would have been called the city of Singai. Taking into account all these aspects and arguments the contention that Nallur and the city of Singai were two different places holds good.