"Indigenous Roman Catholic practice"???? You're citing a trinket stand, no doubt run by a Turkish muslim, selling Greek Orthodox icons with some sort of Turkish charm on them as emblematic of "indigenous Roman Catholic practice"???
There are fewer than 30,000 Catholics in all of Turkey. The Turkish population is 71 million. You do the math. What kind of "indigenous Roman Catholic practice" do you think there is in Turkey?
Would you care to cite that authoritative Roman Catholic declaration that this house is authentic?
The site is run by the the Catholic Church. Also, see the Priests and Nuns hanging around out front? What are they? Chopped liver?