Catherine of Siena (the Italian spelling of the name is used in this book) is one of the great saints of the Middle Ages. Alongside Teresa of Avila, she was declared a Doctor of the Church on October 4, 1970, and since October 15, 1999, she has been the patroness of Europe. Quo vadis domine - Where are you going, Lord? This must have been the question Pope Gregory XI asked himself when he moved the Holy See from Avignon back to Rome, thus not only restoring his own position but also initiating the conversion of his wayward Church. His opponents were numerous, scheming, and powerful. The only source of clarity was an extraordinary woman who cried out against the political chaos in Europe: kindness, love, and peace. This is how it can succeed. Not war. She is Catherine of Siena, patroness of the popes, patroness of Italy, patroness of Europe.