Tensions between the nobility and the clergy

In our nation two castes hold great power: the the nobility and the the clergy. However, they do not always get along. Recently, a baron in our nation and the local monastery of his fief began bickering about who owns a rather large piece of land.\n\nThese days, the royal court is swamped with people yammering about divine right - the the nobility claiming their divine right to rule the land and the the clergy asserting their position as the representatives of God on Earth. The whole situation is growing rather unstable, with the baron in question inciting the other nobles against the the clergy and questioning their right to hold any sort of temporal property. The prior of the monastery has brought in the archbishop on his side, who in turn threatens to go straight to Rome should you decide to side with the the nobility. Now, what shall we do, my liege?