The inscription is real. The one you see is a copy.

Carrer de Marlet replaces vague 'Jewish Quarter mystery' with something much better: a documented object and a documented institution. MUHBA's guide to the Call records a charitable foundation associated with Samuel ben Isaac ha-Sardi near Marlet and Arc de Sant Ramon. A Hebrew inscription connected with that history was incorporated into the facade in the nineteenth century. The stone visible on the street today is a copy; MUHBA holds the original. That small twist is perfect for this route. Authenticity is not a binary choice between real and fake. A copy can honestly mark the location of a real historical object, provided we tell you it is a copy.