I will set upon your throne.
I digress to earlier posts about Mary being of a royal line. The fact that her uncle, as many believe, was Joseph of Arimathea, is how some trace her to the Davidic line. In fact, some believe the lineage came from David's son Nathan as one of the prophets proclaimed that David's line would not continue through Solomon because of the sins of a some of his descendants. This is the warning of the "If your sons will keep My covenant," which evidently Solomon's descendants did not heed.
Mary's father and grandfather were said to have been assassinated in a power struggle over leadership and wealth. This left Joseph of Arimathea as the patriarch of the family who took her under his wing as a child, and again as the widowed mother of Jesus during the time of persecution. Of course being on the Council who delivered Christ up to be crucified, asking to bury him would not have made him popular, rather one of the ones to be persecuted. An early writer said he was in fact jailed for doing so.
It was written of by many of the second century and on writers that he took Mary and other followers of Jesus to escape, some to France and some to England. Some of them--Joseph and his niece Mary, the mother of Jesus--settled in the Cornwall area where his tin mines were located, where the Gastonbury Abbey later was founded (until it was dissolved in 1593 at the Protestant Reformation.)
Oh, there's so much more that I find fascinating (the connection to King Arthur and the Holy Grail, for example), probably much more fascinating to me than to you, dear Reader. So I will constrain myself and go back to Jesus being of the lineage of David as promised in this Psalm which is also quoted in Acts 3:29-31...
and these verses tell of the Person.