MacArthur Foundation record
The source text explicitly lists Illinois as part of the headquarters location information for the MacArthur Foundation. Under the 'headquarters location' section, it specifies: Marquette Building, Chicago, postal code 60603, country United States, street address 140 S. Dearborn Street, and Illinois. This directly confirms that the foundation's headquarters is in Illinois.
Our claim
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Source evidence
1 src · 1 checkNoteThe source text explicitly lists Illinois as part of the headquarters location information for the MacArthur Foundation. Under the 'headquarters location' section, it specifies: Marquette Building, Chicago, postal code 60603, country United States, street address 140 S. Dearborn Street, and Illinois. This directly confirms that the foundation's headquarters is in Illinois.