The Feast Day of St. Catherine of Siena is April 29. She is a Doctor of the Church. You’ll find some useful links below:
Dominican Life USA St. Catherine of Siena
“If you are what you should be, you will set the whole world on fire!”
-St. Catherine of Siena
Catholic Online St. Catherine of Siena
Franciscan Media Saint Catherine of Siena: The Feisty Dominican
Saint Catherine of Siena: The Iconography
Seeds of Faith (Simon Appolioni) St. Catherine of Siena: A Saint for our Troubled Time
