Nearly 2000 yr old Gupta-era iron clamps at foundation ruins, Dashavatar temples, Deogarh, UP. Rust-resistant despite under open sky bearing all weather conditions! Site originally had 9 temples with Garuda stand; main shrine stands tall in ruins. Vandalized by Islamic invaders. 
According 2 distorted chronological narratives we have been fed since decades, Gupta era flourished around 4th-6th century CE. According to book 'Chronology of India' by Vedveer Arya, Guptas flourished around 250 years before BCE. Going by this, clamps/temples here 2000+ yrs old.
'Chronology of India' by Vedveer Arya in 2 Volumes is based on epigraphical, inscriptional, literary, and more evidences. Our distorted historical chronology are creation of our colonial masters who date India's history from 1500 BCE.
Fact is Indian chronology (continuous chronological history from Vedic period, Ramayana, Mahabharata to present) start from 15000/21000 BCE as per literary evidences. Acc to archaeological evidences, Indian civilization dates back beyond 75000 yrs (Jwalapuram excavations).
