Saint Pedro Calungsod (July 21, 1654 – April 2, 1672), also known as Peter Calungsod and Pedro Calonsor, was a Catholic Filipino migrant, sacristan and missionary catechist who, along with the Spanish Jesuit missionary Diego Luis de San Vitores, suffered religious persecution and martyrdom in Guam for their missionary work in 1672.
In Guam, Pedro received basic education at a Jesuit boarding school, mastering the Catechism and learning to communicate in Spanish. He also likely honed his skills in drawing, painting, singing, acting, and carpentry, as these were necessary in missionary work. In 1668, Pedro, then around 14, was amongst the exemplary young catechists chosen to accompany Spanish Jesuit missionaries to the Islas de los Ladrones ("Isles of Thieves"), which have since been renamed the Mariana Islands the year before to honor both the Virgin Mary and the mission's benefactress, María Ana of Austria, Queen Regent of Spain. Pedro accompanied the priest Diego San Vitores to Guam to catechize the native Chamorros. Missionary life on the island was difficult as provisions did not arrive regularly, the jungles and terrain were difficult to traverse, and the Marianas were frequently devastated by typhoons. The mission nevertheless persevered, and a significant number of locals were baptized into the faith.
While in Guam, Pedro preached Christianity to the Chamorro people through catechesis, while baptizing infants, children and adults at the risk and expense of being persecuted and eventually murdered. Through Pedro and San Vitores' missionary efforts, many native Chamorros converted to Roman Catholicism.
Pedro was formally beatified on March 5, 2000, by Pope John Paul II. Pedro was officially canonized by Pope Benedict XVI at Saint Peter's Basilica in Vatican City on October 21, 2012.