He is born in Croth, the French region of Normandy, the 18 of September of 1803. His father worked in a farm and was mayor of the town. Her mother passes away when he was only seven years old.
At the age of 14 years one is going away to live with an uncle priest who animates to him to enter the school-seminary of Evreux, but she will leave it in a moment then was not to taste and she was not successful in the studies. His father was not in agreement with the decision to return to house and he assigns to duros works to him. Santiago asks to retake its studies and march to Paris, to the school San Estanislao, where it will obtain his baccalaureate in 1825.
It study of medicine in the university of the Sorbona and after five years it receives the doctorate. Back from Normandy decides to open a consultation. He was very charitable and it acquired little money by his work, the poor men wanted much to him.
Santiago had been always a religious man, but little by little it stops practicing. It took a comfortable life and it did not need don't mention it, but his it brings back to consciousness was not peacefully; e
same l at a certain time gets to confess: I resisted to God.
Finally, in the autumn of 1834, there is in his life a process of radical conversion that takes to him to return to the religious practice and, even, to spend hours of deep meditation.
In June of year 1835, he enters the Seminary of San Sulpicio, in Paris, and is ordered priest in December of 1838. He will exert his priesthood during two years in the small Norman locality of Pinterville.
At about the middle of June of 1840 something happens to him that was going to change its life for always: the passage by Paris of Monsignor William Collier, apostolic vicar of Isla Mauricio. Monsignor Collier looked for priests of French speech prepared to start off for Isla Mauricio and enters in touch with the superior of San Sulpicio, which speaks to him of the P. Libermann and their desire of a congregation for the evangelisation of the black race, the call Work of the Blacks.
The 17 of November of 1840, arrive at the Seminary of San Sulpicio with desire to form to go to missions. Having passed not even a year, Father Santiago Laval it leaves to Isla Mauricio, as missionary of Coraz³n de Mara, where it will remain for always and she will be a person very loved by all the population, that still today it does not forget to him and says to him with fervor.
Santiago Laval was beatified by John Paul II Pope the 29 of April of 1979.