text: This empire's eighteen principal ministers included the sannidhatri treasurer and samahartri tax collector, who dealt in a silver coin called the pana.
full_question: This empire's eighteen principal ministers included the sannidhatri treasurer and samahartri tax collector, who dealt in a silver coin called the pana. One ruler of this empire declared that "All men are my children" in a message decoded by James Prinsep. During this empire's tenure, the four Barabar caves were cut out of rock and were likely inhabited by the then-active Ajivika sect. After its last leader was assassinated near Taxila, the Shunga empire succeeded this one, which was visited by the Greek ethnographer Megasthenes. After conquering Kalinga, this empire's most powerful ruler issued the Rock Edicts and became a pacifist. For 10 points, name this ancient empire which defeated Seleucus Nicator, which was founded by Chandragupta and led by the Buddhist convert Ashoka.
first_sentence: This empire's eighteen principal ministers included the sannidhatri treasurer and samahartri tax collector, who dealt in a silver coin called the pana.
raw_answer: Mauryan empire [or Mauryan dynasty]