Liopleurodon, you are right that the hanger may have been attached by someone later, not by the maker. But what makes me doubt that these are really from 19th c is mostly the quality of the painting. The 19thc c Qajar tiles come from the walls of wealthy Persian's homes or even palaces and they are made with very nice detail in the paintings, often the figures are also in relief. Also I have never seen traces of actual use as an architectural element (like traced of mortar) on pieces like yours and mine. Also tiles, when taken from the wall, usually get damaged in some way. I can't see that on your pieces. That is why I do not think they are that old, but, as I said already, I hope you are right and not me...