Archaeological discoveries

If historians found an engraved rock pillar from asks time would that be a primary source or secondary?

Primary Source

A primary source is a document or physical object which was written or created during the time under study. These sources provide first-hand evidence about the topic being researched. In this case, an engraved rock pillar from ancient times would be a primary source as it was created during that period and provides direct evidence about the events or activities of that time.