1-157-041 - Ann Ronan Picture Library/Heritage-Images

Flamsteed's equatorially mounted sextant fitted with telescope, 1725. View from the telescope side. On the right of the picture is the top of the exterior of the Octagon Room at Flamsteed House, Greenwich, built on the orders of Charles II (1630-1685) which became the first Royal Observatory. Flamsteed (1646-1719) was the first Astronomer Royal. From Historia Coelestis Britannica by John Flamsteed. (London, 1725).