This article shows the relevance of past ages to the current project of the new evangelization. In particular, it presents St. Catherine of Siena as an example of the intuition that saints throughout the history of the Church have had regarding how to undertake the process of evangelization. The concept of the “new evangelization” is outlined by referring to the writings and speeches of Pope St. John Paul II, Pope Benedict XVI, and Pope Francis. While covering the basic features of the new evangelization, Saint Catherine's life and insights are presented as an example of how to accomplish the project of the new evangelization.