Antoinette Bourignon de la Porte was a French-Flemish mystic and adventurer. She taught that the end times would come soon and that the Last Judgment would then fall. Her belief was that she was chosen by God to restore true Christianity on earth and became the central figure of a spiritual network that extended beyond the borders of the Dutch Republic, including Holstein and Scotland. Bourignon's sect belonged to the spiritualist movements that have been characterized as the "third power".

Niels Steensen ; 1 January 1638 – 25 November 1686 [NS: 11 January 1638 – 5 December 1686]) was a Danish scientist, a pioneer in both anatomy and geology who became a Catholic bishop in his later years.