There is a general consensus among scholars that 1 Corinthians was written by the important early Christian missionary Paul of Tarsus. In late 56 or early 57 a.d., Paul was in the city of Ephesus in Asia Minor. From there, writing with his collaborator Sosthenes, he addressed a series of letters to the Greek city of Corinth, which he had visited between 50 and 52 a.d., and where he had converted both Jews and Gentiles to the Christian faith. Corinth was located on the isthmus connecting the Peloponnesian peninsula to the Greek mainland, and its advantageous location allowed it to become a prosperous merchant city.