Today is the feast of St Catherine of Sienna. She is not a saint I am particularly familiar with which is a shame as she is one of the earliest women recognized by the church, was a doctor and is credited with changing the course of history and ushering in a process that helped to stabilize Europe.
Here is a great podcast about her life that is worth listening to.
You can also listen to this and others of her prayers being read on Catholic podcast
And read (or listen) to a short account of her life on Saint of the Day.