Mercator, "The Merchant," is a Latin comedic play for the early Roman theatre by Titus Maccius Plautus. It is based on the Greek play Emporos (the Merchant) by the Greek comedy playwright Philemon. It is believed to be among Plautus's first plays, possibly written around 206 BC. The central conflict involves a father who falls in love with a slave girl who is, unbeknownst to the father, his son's lover. Source: Wikipedia (en)