Pierre-Jean De Smet was a man of faith. He traveled a long way to help people. He met many Native American groups. He even helped people talk about peace. He was a very busy traveler.
Pierre-Jean De Smet was a priest. He was born in Belgium. He moved to the United States to help people. He traveled many miles to meet Native American groups. He learned their ways of talking.
Pierre-Jean De Smet was a Catholic priest. 
De Smet traveled many miles. He worked with many Native American groups. He visited the Potawatomi in Iowa. He also worked with the Salish people. He helped start several missions. A mission is a place where people live and practice their faith. 
De Smet was a good map maker. He made a detailed map of a river valley. 
Pierre-Jean De Smet was a famous Catholic priest and a member of the Society of Jesus. 
De Smet's work often involved setting up new places for people to live and practice faith. These places are called missions. In 1838 and 1839, he helped start St. Joseph's Mission in what is now Council Bluffs, Iowa. 
To do his work, De Smet had to learn many new things. He studied Native American languages and customs while living in Florissant, Missouri. He was also a very skilled map maker. He created the first detailed map of the upper Missouri River valley system. 
De Smet's travels were often very long and difficult. Between 1845 and 1846, he went on a huge expedition through the Rocky Mountains. He traveled through places that were then called Oregon Country and the Columbia District. He crossed the Kootenay River Valley and went past Columbia Lake. He even climbed over the Great Divide to reach British territory. While traveling, he erected a large wooden cross at the top of Whiteman's Pass. He eventually reached Fort Edmonton to meet with the Cree, Chippewa, and Blackfoot people. These trips required a lot of strength and courage.
Today, we can still see the history of De Smet's life in many places. His many papers are kept in archives in St. Louis and Washington State. A statue of him stands in his birthplace of Dendermonde, Belgium.
Pierre-Jean De Smet was a prominent Flemish Catholic priest and a member of the Society of Jesus, also known as the Jesuits. 
De Smet's journey toward missionary work began with significant preparation in the United States. He arrived in 1821 with eleven other Belgian Jesuits. His early training took place at White Marsh, a Jesuit estate near Baltimore, Maryland. In 1823, he moved to Florissant, Missouri, to complete his theological studies. During this time, he also began studying various Native American languages. He worked at the St. Regis Seminary, where he had his first contacts with indigenous students. This environment allowed him to learn about different tribal customs and languages. He was ordained a priest on September 23, 1827.
In the late 1830s, De Smet established important mission sites in the Iowa Territory. In 1838 and 1839, he helped found St. Joseph's Mission in what is now Council Bluffs, Iowa. 
One of De Smet's most significant missions involved the Salish people of the Pacific Northwest. The Salish had sent several delegations to St. Louis to request "black-robes," or Catholic priests. These requests were driven by a desire for religious services for their sick and dying members. After meeting a Salish delegation in 1839, De Smet felt it was God's will to help them. He traveled to Salish territory to establish a permanent mission. On July 5, 1840, he offered the first Mass in Wyoming, a mile east of Daniel. When he reached Pierre's Hole, he was greeted by 1,600 Salish and Pend d'Oreilles people. He baptized 350 individuals during this period. He later helped found St. Mary's Mission in the Bitterroot Valley.
Between 1845 and 1846, De Smet undertook a massive expedition through the Rocky Mountains. This journey took him through the Oregon Country and the British Columbia District. He traveled through the Kootenay River Valley and crossed the Great Divide. At the top of Whiteman's Pass, he erected a large wooden cross that could be seen for miles. He continued his trek to reach the North Saskatchewan River and eventually arrived at Rocky Mountain House. His goal was to meet with the Cree, Chippewa, and Blackfoot nations. This expedition was physically demanding and required traveling through vast, rugged territories. He eventually returned to the Columbia District via the York Factory Express trade route.
Throughout his career, De Smet established several lasting religious institutions. In addition to St. Mary's Mission, he founded the Sacred Heart Mission for the Coeur d'Alene in Idaho. In 1854, he helped establish the mission in St. Ignatius, Montana, located on the Flathead Indian Reservation. 
De Smet passed away in St. Louis on May 23, 1873. He was originally buried near Florissant, but his remains were moved to Calvary Cemetery in 2003. His historical legacy is preserved through various archives and monuments. His papers are held at the Jesuit Archives in St. Louis and the Washington State University archives.
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