A department of the British government, now known as the Foreign, Commonwealth and Development Office (as of 2020).
The graph displays the other subjects mentioned on the same pages as the subject "Great Britain. Foreign Office". If the same subject occurs on a page with "Great Britain. Foreign Office" more than once, it appears closer to "Great Britain. Foreign Office" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.