The colony of Maryland was established in 1634. Admitted as the 7th state, Maryland achieved statehood April 28, 1778. (Brit; Wiki)
See also: https://www.britannica.com/place/Maryland-state
The graph displays the other subjects mentioned on the same pages as the subject "Maryland". If the same subject occurs on a page with "Maryland" more than once, it appears closer to "Maryland" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.