ITI Catholic University (German: Katholische Hochschule ITI) is a Catholic theological school in Austria. The school was founded in 1996 as the International Theological Institute at the request of Pope John Paul II. It was then located in the Kartause Gaming and moved in 2009 to Schloss Trumau near Vienna. Its motto is 'Sicut cervus ad fontes'. The ITI's patrons are St. Thérèse of the Child Jesus, St. Thomas Aquinas and St. Zdislava of Lemberk.
The ITI's mission, as established by Pope John Paul II, unites in a special manner the Eastern and Western traditions of the Church. The Mass/Divine Liturgy is celebrated daily in both the Roman and Byzantine Rites respectively. From its inception the ITI has also given special attention to marriage and family. The Institute employs the Great Books method in its pedagogy in preference to lecture-based instruction in the encyclopedist tradition. The ITI is committed to the primacy of Thomas Aquinas in Philosophy and Theology, i