The address on their website is nbr 53 and it is explicitely linked to the address node with nbr 53
https://www.openstreetmap.org/relation/15887304
OSM data is correct, that is the most important.

It looks like the text you copied in your comment comes from Nominatim—this is the software behind the search bar on osm.org.  People who are unfamiliar with OSM are often confused by how it works; this system is not meant to return an accurate address, it is just a simple reverse geocoder which returns the nearest street; it does not work well in large cities.

Have a nice day.