He was appointed city architect on 29 October 1648, with retroactive effect from 1 August. His annual salary was set at 1600 guilders, quite a considerable at that time. Why Stalpaert was suddenly appointed city architect by the Amsterdam city council is unclear as he likely had never designed a building before.
He was appointed city architect on 29 October 1648, with a retroactive date of 1 August. His annual salary was set at 1600 guilders, which was a substantial amount at that time. The circumstances surrounding Stalpaert's unexpected appointment as city architect by the Amsterdam city council remain unclear, as it is likely he had no prior experience in designing buildings.