He came from a noble family and entered the Dominican Order at the Convent of St. Dominic in Valencia in 1544, at the age of eighteen. As a young friar, he was known for his piety, austerity, and intellectual pursuits. He served in various roles within the order, including as master of novices, guiding new members in their spiritual formation.

Missionary Work in the New World

In 1562, Bertrand volunteered for missionary work in the New World. He was sent to the Spanish colonies in what is now Colombia, spending seven years primarily in the region of New Granada. During this time, he dedicated himself to evangelizing the indigenous populations, learning their languages, and defending their rights against abuses by some Spanish colonists. He is credited with converting thousands to Christianity, often baptizing large groups at once. His missionary efforts were marked by powerful preaching and deep compassion.

Return to Spain and Later Ministry Upon returning to Spain in 1569, Bertrand continued his ministry as a preacher and spiritual director. He became a close friend and confessor to St. Teresa of Ávila, offering her guidance and support in her efforts to reform the Carmelite Order. He also served as prior of several Dominican convents.
Death and Legacy St. Louis Bertrand died in Valencia on October 9, 1581. He was canonized by Pope Clement X on April 12, 1671. He is considered the patron saint of Colombia and is often invoked against snakebites.