How did the catholic church support the claims of monarchs? ?

The catholic church support the claims of the monarch because of having to see the old testament in the bible where it shows claims about monarchs and because of that, the church has the need to co-exist with the monarch and they had to recognize the claims of the monarchs.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

the answer to your question is

the treaty of hopewell