"The old Town House (Dorphuis) is a building on Greenmarket Square that was built in 1761 and was one of the city's first double storey buildings. It has been used as the seat for the Burgher (citizen) Senate, a magistrate's court, a police station and as the City Hall until 1905 when the next City Hall was completed. In 1916 it became the city's first art museum and is still used to house art and as a venue for musical performances."
Thanks to Malo Mystery for providing the above information and for telling me about this milestone which marks 15 miles to the Old Townhouse. This is a magnetic film container and it is an easy park 'n grab in a location very close to the XV milestone.
Please replace it so that it is as inconspicuous as possible