File:Magic Square 21.png

Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1931. As such, this image is in the public domain in the United States.
Category:PD BritannicaCategory:Images from Encyclopædia Britannica Category:Images from Encyclopædia Britannica Category:Black squares Category:Media missing infobox template
Category:Black squares Category:Files with no machine-readable author Category:Files with no machine-readable source Category:Images from Encyclopædia Britannica Category:Media missing infobox template Category:PD Britannica