Four astrolabes survive signed by Regnerus Arsenius but controversy still surrounds whether this maker existed in his own right or whether he was one and the same as Gualterus Arsenius.
E. Zinner, Deutsche und Niederl?ndische astronomische Instrumente des 11. bis 18. Jahrhunderts (2nd ed., Munich, 1967), pp. 236-8 and p. 679; V. A. Rasquin, Dictionnaire des Constructeurs Belges d'Instruments Scientifiques (les origines ? 1914) (Brussels, 1996), pp. 2-4; K. van Cleempoel, "La Produccion de Instrumentos Cientificos en Lovaina en el Siglo XVI", in K. van Cleempoel et al, Instrumentos Cientificos del Siglo XVI: la Corte Espa?ola y la Escuela de Lovaina (Madrid, 1997), pp. 87-109 [pp. 59-74 in the English summary]; G. M. H.[udson], "Sphere No. 7: A Planispheric Astrolabe by Regnerus Arsenius?", Sphæra: The Newsletter of the Museum of the History of Science, Oxford, issue no. 7 (Spring, 1998), p. 7.
Astrolabe, Signed by Regnerus Arsenius, Louvain, Dated 1565 (Oxford, MHS)