Gary Schwartz, “Gerard Pietersz. van Zijl the portraitist: a ghost story,” in Facebook: studies on Dutch and Flemish portraiture of the 16th-18th centuries, Liber amicorum presented to Rudolf E.O. Ekkart on the occasion of his 65th birthday, Leiden (Primavera Pers) and The Hague (Netherlands Institute for Art History [RKD]) 2012, pp. 301-10
Gary Schwartz, “With Emanuel de Witte in the Oude Kerk in Amsterdam,” Geest en gratie: essays presented to Ildikó Ember on her seventieth birthday, Budapest (Szépmüvészeti Múzeum) 2012, pp. 84-91
The photographs of the Oude Kerk and Nieuwe Kerk were taken in spring 2012 by Piet Musters.