There is no map of Loevestein Castle in the Special Collections but this print, by Claes Jansz. Visscher, published in the year that Grotius was imprisoned there, shows just how immense the castle was and how it could be reached, by boat, from the small town of Gorinchem – Grotius received his books from here. Nowadays Loevestein Castle is located in the province of Gelderland but in 1619 it was in the province of Holland and was used as a prison, especially for political convicts. Many regarded Loevestein as a final destination and as such it was a major deterrent against political dissidence.
C.J. Visscher (1587-1652), 't Huys te Lovensteyn, print, 1619 [COLLBN Port P 329 N 210]