New Orleans' colonial history of French and Spanish settlement generated a strong Roman Catholic tradition. Catholic missions ministered to slaves and free people of color and established schools for them. In addition, many late 19th and early 20th century European immigrants, such as the Irish, some Germans, and Italians were Catholic. Within the Roman Catholic Archdiocese of New Orleans (which includes not only the city but the surrounding parishes as well), 40% percent of the population is Roman Catholic. Catholicism is reflected in French and Spanish cultural traditions, including its many parochial schools, street names, architecture and festivals, including Mardi Gras.