There are very few sources on the architectural changes in the original house block. We know for certain that gables, windows and doors must have been updated in this period, as can be seen on Johannes van Call's water colour of the Diaconie Orphanage (see previous step). The main sources that document the changing styles, are of much later date. There are many photographs from the 19th and 20th centuries, showing historical gable styles that can be dated to the latter half of the 17th century. This type of source comes with its own difficulties, resulting in greater reconstruction uncertainty. The main issue is the possibility of later modifications on these gables, which was a very common practice. Without a thorough building historical investigation, the architectural layering of modifications cannot be reliably assessed.
