Unesco links this heritage site with its Spanish colonial past of 16^th century; its ‘excavations have proved that it is indeed the colonial city of León. The excavated vestiges are authentic, excluding some necessary interventions for their waterproofing….The Ruins of León Viejo preserve the plans of a Spanish-American city founded during the first stage of the conquest and colonization of the American continent’.

Viejo refers to vajra or the weapon of the Thunder God Indra who is called Vajrapani means ‘he who holds the vajra in his hand’; Vajra or Fa-shi-lo of Chinese pilgrims accounts, marks name of a country as well as name of a king who was then connected with ancient Nalanda. The seat of Buddha where he got enlightenment is also known as ‘Vajra’ or vacca. Many ancient kings adopted this name ‘Vajra’ as a sign of their strength and valour. But the ancient name of Rama-grama is known as Lan-mo in Chinese. It seems that Leon Viejo refers to Vajra-people of Rama-grama who after migration had reached here in Nicaragua. Kings of Rama were Koliyans, and were identified with Nagas or Na-kie from which cities in the name of Nagara,  Nagarkot, and Nagarahar or Na-ki-lo-ho , identify their ancient settlements, Some texts find these people as followers of the Buddha, and also as worshippers of Nygrodha tree. In these cases and also as name of their ancient settlements indicate, name of Nicaragua, perhaps, holds the ancient identity of its people.

The town of Puerto Momotombo near which the Ruins of Leon Viejo stands marks a volcanic site opposite to it in the ‘same name’. So name Leon Viejo is neither a Spanish name nor its etymological past preserves and points to any literary explanation to pinpoint its historical relationship with Europe.

Puerto Momotombo similarly specifies the seat of worship of Mata Amba or Ambika at Ambagrma near Nalanda and Nagarahara. It was near Wutu or Ithica or Otthaka or Athaka of Pali literature. The whole scenarios explains and specifies a particular region from where ancient migrants moved taking strenuous sea routes and reached Nicaragua and settled first at a place whre without their knowledge was a seat of volcanic. Thereafter they must have left this place and shifted to another place. The migrants named this volcano with name of their Goddess Mata(Mater or Mother) Ombro; another meaning of ambrara as ‘sky’ seems to satisfy the volcano’s all-pervading position here.

Natural disasters have made this site uninhabitable; ‘the city has been destroyed by the Momotombo volcano that irrupted in 1578; the earthquake of 1610 struck the final blow by destroying what remained standing…. The gradual burial of the city due to natural disasters has preserved the vestiges unaltered and in the same environment, without having undergone any change’. Unesco, on this heritage site, says, ‘the ruins includes the Cathedral of Santa María de la Gracia, the La Merced church and convent, the Casa de la Fundición(The Foundry) …..These structures all have a relatively simple shape and are built of  tapial.’ Tapial is indicative of the Naga or the Serpent Apalala or O-po-lo-lo who was residing in the Udyana or U-chang-na. It was name of a Naga King, and was name of a place directly linked to the place of enlightenment of the Buddha.