Msgr. Rossetti

Response: I can understand your wanting to keep these memorabilia from your grandfather. I do not want to do anything to disparage your relationship with your grandfather. And, of course, when loved ones pass, we should remember them in prayer and offer Masses for their happy repose. Nevertheless, the Catholic Church has consistently, and even recently, prohibited Catholics from joining the Freemasons or related organizations. As recent as November 2023, the Holy See said: "Active membership in Freemasonry by a member of the faithful is forbidden." 
[See: https://www.vatican.va/roman_curia/congregations/cfaith/documents/rc_ddf_doc_20231113_richiesta-cortes-massoneria_en.html]. 

While some of their charitable activities are praiseworthy, their beliefs are incompatible with the faith. In fact, exorcists consistently experience that people who have some freemasonry in their background often have demonic afflictions as a result. These afflictions are serious and the strong curses associated with freemasonry need to be renounced and cast out. Thus, we would not recommend keeping any items connected to freemasonry. I would presume that they carry a curse with them. Rather, the items should be exorcized and discarded.

We have prayers on our APP/website under "Deliverance Prayers for the Laity" for both breaking freemasonic curses and also disposing of cursed objects.