a Dutch cartographer, atlas maker and publisher. He was one of the notable representatives of the Netherlandish/Dutch school of cartography in its golden age (the 16th and 17th centuries). Between 1594 and 1596, as a student of the Danish astronomer Tycho Brahe, he qualified as an instrument and globe maker. In 1600 he discovered the second ever variable star, now known as P Cygni.
