St. Catherine of Siena was born during an outbreak of the Plague in Siena in 1347. She was brought up in the faith and especially after her own sister died at the age of sixteen found herself committed to pursuits of piety. She joined the Dominican order and, at the age of twenty-one, had what she described as her "mystical marriage" to Christ. Today, we know St. Catherine mostly through the many letters she wrote to her fellow brothers and sisters...