The article sketches the life and work of a German anti-Trinitarian theologian, Christopher Sandius Jr. (1644-1680). Sandius Jr. was well educated by his rigorous father, Christopher Sr, a highly positioned government official in the Ducal Prussia, who was later removed from his office for anti-Trinitarian sympathies. Sandius Jr.'s activity spread into various European countries, including: England, Germany and the Netherlands where he earned his living as an editor and translator. However his greatest interest remained in theology and church history and he became well-recognized among European intellectuals. For the Protestant and Catholic Orthodox, Sandius Jr. was highly controversial because of his view that Arianism was the very climax of the theological thought of the Early Church. He remained in good terms with exiled Polish Socinians (Andrzej Wiszowaty, Stanislaw Lubieniecki), being however engaged in polemics with them on the problem of the pre-existence of Christ which they denied. Sandius Jr. also enjoyed close relationship with Benedictus Spinoza especially at the end of his life when he became known as one of philosopher's most faithful followers. Between 1676-1680 he even defended author of the 'Tractatus theologico-politicus' in his vast correspondence with a famous Catholic theologian and philosopher Pierre Daniel Huet.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.