I remember that I have heard in some lecture about some form of a siege over Nablus that ended up in indiscriminate killings of Muslims in the city. I vaguely remember that the events were said to have taken place in the 11th or the 13th century (?)
I also remember seeing some image of a Fresca that allegedly commemorates the event, and I was told it was painted in some Catholic church in Italy (?)
But, I cannot find any references to any of those matters.
Was it really an event or maybe I simply mix all the things?