original_query: What are the Gupta and post-Gupta inscriptions found in Delhi?
query: What are the Gupta and post-Gupta inscriptions found on the Delhi Iron Pillar?
answer: The oldest inscription on the Delhi Iron Pillar is attributed to the Gupta emperor Chandragupta II.  There's also a shorter inscription associated with the Tomara king Anangpal, though its interpretation is debated.