This is a very interesting article that will allow you to relive
Ramayana through various items that existed during that time..which was
about 20 000 years ago. ...thanks to the grace of Bhagavan
Shri Sathya Sai Baba who materialised ( create or teleport by divine will ).Time and space do not apply to the divine plane.Bhagavan is known to materialise items that existed throughout history.
Shri Rudram is part of the Vedas.It occurs in the Taittiriya Samhita of Krishna Yajur Veda.The Panchakshari 'Namah Shivaya' comes from the middle portion of Shri Rudram ( 8th Anuvaka )