I know not what museum this was, nor where. But where do
they think they got the authority to announce that "you cannot
refer to a Jews Harp as a Jews Harp any more?"

The museum is surely within its rights to instruct its own
employees in the language that may be used in the museum's
name(though I think that policy is ill-founded, ill-advised),
but if they are speaking to the wider population, whence cometh
their authority? The term "Jews Harp" is of great age, and
is not pejorative by any means.

Dave Oesterreich