Original Iron Pillar of Delhi

Origin
Currently located in the Qutb complex, the Iron Pillar of Delhi was likely constructed in the 400s by the Gupta monarchs. Standing 7 meters tall and weighing over 6000 kg, its strange properties have interested archaeologists since its discovery. The pillar suffers from very little rusting, despite centuries exposure to the elements. Seen as a testament to the quality of ancient Indian blacksmiths, its high resistance to corrosion is thought to be from a crystalline layer protecting the iron.

Effects
The artifact reconnects any lost ions in the molecular structures of materials, rejuvenating the building to a younger state. However, they keep reconnecting until they revert to the original compounds. At that point, the structure becomes durable but very resistant to change, denying rust, dirt, paint, mold and repairs from interacting with it almost entirely.