The church, of Neo-Renaissance style, is the fourth in the history of Kamouraska. It was built from 1914 to 1916, partly on the walls of the previous burned in February 1914. Inside, there are remarkable silverware such as the font (1839), the lamp of the sanctuary (1840) and a organ cabinet shaped by Louis-Thomas Berlinguet dating from 1850. Saint Louis, King of France, is the patron saint of the parish probably in honor of Louis Aubert de Forillon, lord of Kamouraska from 1700 to 1713.