Wilhelm van Ehrenberg

Balclis, from Spain, sells on 8 July 2015 a "Flemish School, 17th century, circle of Peeter Neefs II and Frans Francken II" painting of the Liberation of Saint Peter, a very large oil on copper (81 by 116, which is extremely large for a copper painting of that age) estimated at 6,000 Euro.

While Neefs and Francken have painted similar works, the painting is by far the most closely related to the work of Wilhelm Schubert van Ehrenberg (an Antwerp painter of German origin, ca. 1630-ca.1700). A painting like the above "Dungeon interior" (from a private collection) is quite similar in style and composition. The figures on that one are by Hieronymus Janssens, and it is quite possible that the figures on the one for sale are also by another painter.

As so often, the best evidence comes from the RKD, with the above painting (sold at Christie's in 1995). While not a copy of the one for sale, it is so close as to make an attribution to the same artist quite likely. It should fetch about 10,000 Euro.