Some plates of the famous Uranometria Atlas (two editions 1624/1639/1641/1648/1655/1661/1666/1689? (light blue background) & 1661 (dark blue background)) by Johann Bayer I acquired in 2014 and 2016.
First published in Augsburg, Germany, in 1603 by Christoph Mang (Christophorus Mangus) as "Uranometria: omnium asterismorum continens schemata, nova methodo delineata, aereis laminis expressa".
It was the first atlas to cover the entire celestial sphere.