Her work in this medium is not limited to isolated commemorative dates, but rather constitutes a monumental, long-term encyclopedic and hagiographical work . Through hundreds of systematically published biographies, the author explores the altars of the universal Church—from the earliest centuries of Christianity and the Church Fathers to contemporary martyrs, founders of orders, popes, mystics, and blesseds from all five continents. Each article is a rigorous exercise in historical and theological memory that recovers not only liturgical dates, but also the contexts of persecution, reform, charity, and evangelical dedication that defined each figure, making her archive at Exaudi an indispensable resource for prayer and the understanding of Catholic sanctity.

Isabel Orellana’s work in Exaudi encompasses multiple dimensions of Church life, structured around major thematic axes that reflect her profound knowledge of ecclesiastical history and spirituality:

• The Fathers and Doctors of the Church: He dedicates a significant portion of his work to rescuing the teachings and intellectual courage of the great doctrinal pillars of early and medieval Christianity (such as St. John Chrysostom, St. Robert Bellarmine, and St. Thomas of Villanova). His texts emphasize how their defense of doctrinal orthodoxy was always linked to a profound pastoral zeal, eloquence, and a radical consistency of life in the face of the crises of their respective eras.

• Martyrs and Witnesses of the Faith of All Times: A fundamental pillar of his work is the chronicle of those who sealed their fidelity to Christ with their blood. From the martyrs of the persecutions in Asia (such as Saint Francis Ch’Oe Kyong-Hwam or Saint John Gabriel Perboyre) to the defenders of the faith in contexts of political or religious hostility, Orellana details their martyrial experiences with respect and vividness, presenting them as beacons of fortitude, forgiveness, and hope for the world today.

• Saints of Charity and Service to the Marginalized: The author pays special attention to the profiles of saints and blesseds whose holiness was manifested in their physical and spiritual dedication to the outcasts of society: the sick, slaves, the poor, and orphans. Notable examples in this collection are her biographies of Saint Peter Claver (apostle of the slaves in Cartagena de Indias) and Saint John Macias, highlighting how Christian mysticism inevitably translates into overflowing works of mercy.

• Founders, Missionaries and Spiritual Renewers: Its archive also records the work of key figures in the universal missionary expansion of the Church (such as Blessed Paul Manna) and of great reformers who promoted spiritual and institutional renewal at crucial moments in history, highlighting the ever-renewed vitality of the Holy Spirit in the various religious families (Augustinians, Dominicans, Jesuits, Vincentians, Benedictines).

• Liturgical Feasts and Mysteries of the Faith: Beyond individual biographies, Orellana addresses major solemnities and commemorations of the liturgical calendar—such as the Exaltation of the Holy Cross. In these texts, the author transcends mere historical chronicle to offer profound theological meditations that invite the reader to contemplate the central mysteries of redemption and Christian devotion throughout history.

All articles by Isabel Orellana