Saint Ignatius of Loyola was a Spanish Basque Catholic priest and theologian in the 16th century. He was one of the founders of the religious order called the Society of Jesus and served as its first Superior General at Paris. He was an inspired spiritual director and the founder of what is today known as "Ignatian spirituality."
Teresa of Ávila, also known as Saint Teresa of Jesus, was a Spanish noblewoman who later turned into a Carmelite nun. She was posthumously named a Doctor of the Church. She co-established the Discalced Carmelite Order. Her written works include The Interior Castle and her own autobiography.

Spanish scholar Isidore of Seville is widely remembered as the last of the Western Latin Fathers. His Etymologies was a chief reference book for years. The 7th-century archbishop of Sevilla wrote about varied subjects, such as religion, science, history, and linguistics. He had a major role in the Councils of Toledo.

Josemaría Escrivá was a Spanish priest best remembered for founding an organization called Opus Dei. He is also remembered for authoring a book titled The Way. The book has been translated into many languages and has sold millions of copies around the world.
Michael Servetus was a Spanish physician, Renaissance humanist, cartographer, and theologian. In 1553, he published a book titled Christianismi Restitutio in which he described the function of pulmonary circulation, becoming the first European to describe it accurately. A polymath, Michael Servetus was well-versed in many fields, such as mathematics, geography, meteorology, astronomy, human anatomy, pharmacology, medicine, poetry, jurisprudence, and translation.

Francisco de Vitoria was a Spanish Roman Catholic theologian, philosopher, and jurist of Renaissance Spain. He founded the School of Salamanca, a tradition in philosophy. He made tremendous contributions to the theory of just war and international law. His works have been interpreted by various scholars to support contrary policies. He taught at the universities of Valladolid and of Salamanca.

Spanish Jesuit priest, philosopher, and theologian Francisco Suárez was born to an affluent lawyer and had initially studied law. However, he joined the Jesuits later, following which he taught philosophy and theology. Known for writing Disputationes Metaphysicae, he was a prime figure of the School of Salamanca movement.

Born to a Spanish Catholic mother and an Indian Hindu father in Barcelona, Raimon Panikkar grew up to be a Catholic priest and a philosophy professor. An expert in comparative religion, he compared the tenets of Catholicism and Hinduism in his doctoral thesis. He also penned several spiritual texts.


Spanish-Salvadoran Jesuit priest and human rights activist Ignacio Ellacuría contributed massively to the development of Latin America’s liberation theology. While teaching at the Universidad Centroamericana José Simeón Cañas, he also faced severe army backlash for his political activism. He was eventually assassinated by an elite army unit.

Seventeenth-century Spanish mystic and priest Miguel de Molinos propagated an extreme type of Quietism through his book Spiritual Guide. He believed people should sacrifice their individual wills to make way for God’s will. He was eventually imprisoned for heresy and died in custody, amid rumors of sexual misconduct.

Xavier Zubiri was a prominent member of the Madrid school of Spanish philosophers. While he initially studied theology and philosophy, Zubiri was also well-versed in physics and biology. His works such as Intelligence and Logos and Nature, History, God studied reality as a mixture of science, religion, and philosophy.

Spanish philosopher Jaime Luciano Balmes is best known for iconic work Protestantism and Catholicism Compared in Their Effect on the Civilization of Europe, penned in defense of Catholicism. An expert in civil and canon law, he initially taught math and physics, and was criticized by Catholics for being too liberal.




Simeon ben Zemah Duran was the first Spanish Jewish rabbi to earn a regular salary from the community, going against the trend of the rabbi’s post being honorary. He excelled in subjects such as philosophy, math, and medicine, and is best remembered for his commentary Magen Avot.




Dominican theologian Bartolomé Carranza had also been the archbishop of Toledo. Known for works such as Summa conciliorum and Quattuor controversiae, he was charged with heresy and imprisoned for almost 17 years during the Spanish Inquisition. He died 18 days after being acquitted due to lack of proof.

One of the most significant figures of Adoptionism, a form of christology, Felix had been the bishop of Urgell in 8th-century Spain. Most of his works, including the iconic Against the Saracen, were later destroyed or were practically lost. Accused of heresy, he was exiled and later died in Lyon.
