The Octagon Room at the Royal Observatory in the 1670s

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The Octagon Room at the Royal Observatory in the 1670s
The Octagon Room at the Royal Observatory in the 1670s - all credit to http://www.royalobservatorygreenwich.org/ for this wonderful image

The Octagon Room at the Royal Observatory in the 1670s – all credit to http://www.royalobservatorygreenwich.org/ for this wonderful image