After a holiday absence of over a month, here's a few updates. New are pages about J.H. van Groenendael and N.J.H. van Groenendael, brothers of J.H.H. van Groenendael. During my research I found evidence that several churches commonly, and also by me in the past, attributed to J.H.H. van Groenendael were in fact designed by one of his brothers. This means the latter page is now corrected as well. Research was largely based on information found in newspapers from the period 1890-1942.
Also new are three pictures on the page about J.H. Sluijmer.