Facade stones.
Until the time of Napoleon, houses didn’t have numbers, they had names.
The names were in the shape of a facade stone or written on the shutters. It could be a fantasy name, the coat of arms of the person living in the house or their profession.
House of Bols🍸
As a guide, you get to visit all the interesting venues in Amsterdam, like the House of Bols @bolscocktails, where my group is now enjoying a cocktail workshop (and I a Pornstar Martini)😉