What did St Patrick, St Augustine and St Columba do during the Anglo-Saxon period?

• They invented new farming techniques.
• They led an uprising in Wales.
• They helped to spread Christianity across Britain.
  Explanation:

  "The most famous of these were St Patrick, who would become the patron saint of Ireland, and St Columba, who founded a monastery on the island of Iona, off the coast of what is now Scotland. St Augustine led missionaries from Rome, who spread Christianity in the south."
• They fought courageously against the Romans.