Cretin-Derham Hall High School (CDH) is a private, co-educational Catholic high school in Saint Paul, Minnesota operated by the Archdiocese of Saint Paul and Minneapolis. It is co-sponsored by the Brothers of the Christian Schools and the Sisters of St. Joseph of Carondelet. Cretin High School was named for Joseph Crétin, the first Catholic bishop of Saint Paul, while Derham Hall High School was named for Hugh Derham, a Minnesotan farmer who donated money to start an all-female Catholic boarding school.