Is historians found an engraved rock pillar from asoka's time would that be a primary source or a secondary source why?

An engraved rock pillar from Asoka's time would be considered a primary source. This is because it is an original artifact from the period in question, providing direct evidence of Asoka's reign, including his policies and beliefs. In contrast, secondary sources would analyze or interpret such artifacts, offering context or commentary based on primary sources.