The list, compiled by the United Nations Economic, Scientific and Cultural Organization (UNESCO), recognizes the world's most significant cultural and natural sites.
The missions are five buildings constructed in the 18th century as Christian outposts in the New World. Four are within San Antonio Missions National Historical Park; the fifth is the Alamo, owned by the state of Texas and maintained separately.
The nomination by the U.S. Interior Department will be considered by UNESCO for inclusion in 2015 on a list of 981 heritage sites around the world. It would be the 22nd United States site to be inscribed on the list.
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