The Cason del Buen Retiro is a historical building located in Madrid's Retiro Park. It was originally a palace built as part of the royal Buen Retiro Palace complex during the reign of Philip IV of Spain. The Cason del Buen Retiro now houses the Museo del Ejército, a museum focused on military history. It is a significant architectural and historical landmark within the beautiful surroundings of Retiro Park.
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