Identify the region where the Catholic Church had major holdings during the 1600s.

Catholic Church had a great influence in Europe during the 1600s, as it is shown on the map. Practically most of the European territory were Catholics. Its influence reached Spain, France, Portugal, Italy, Poland, Austria, England, and Ireland.
During the 17th century, the Roman Catholic Church sent Missions to the Americas to spread Catholicism in the New continent in order to convert the indigenous peoples. Other Jesuits, Franciscans and Dominicans missions went to Asia and the Far East. Japan and Ethiopia were hard places to evangelize.
A Church of England was led by a monarch, while the Catholic Church was led by a pope.
Catholic Church had a great influence in Europe during the 1600s, according to shown on the map. Most of the European territory were Catholics.
Moreover, at the time of 17th century, the Roman Catholic Church sent Missions to the Americas to spread Catholicism in the New continent for converting the indigenous peoples.
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