Spanish missions in the Americas
The Spanish missions in the Americas were Catholic missions established by the Spanish Empire during the 16th to 19th centuries in the period of the Spanish colonization of the Americas. Many hundreds of missions, durable and ephemeral, created by numerous Catholic religious orders were scattered throughout the entirety of the Spanish colonies, which extended southward from the United States and Mexico to Argentina and Chile.
Source: Wikipedia — Spanish missions in the Americas (CC BY-SA 4.0)