The Roman Catholic Church possesses the Shroud of Turin. As a Catholic, I fully accept that the Shroud of Turin MAY not be authentic as the shroud of Jesus Christ although the evidence seems to suggest that it is. It may also be the lost Shroud of Odessa as well as the Shroud of Jesus Christ as the residents of Odessa believed. It may be a clever forgery as many critics seem to believe in which case it is one of the most remarkable forgeries in the history of humanity. Nevertheless, my faith does not and ought not to rest on the Shroud one way or the other nor yours on the unknown and unseen ossuary lid.
May it be noted, however, that the Romnan Catholic Church not only displays the Shroud to the public with some regularity with due regard for its preservation but also allows for scientists critical of Christianity and Catholicism and outright hostile atheist scientists access for scientific testing to take their best shot. Whoever possesses this ossuary lid ought to do likewise if he or she expects to be taken seriously or he or she ought to at least allow viewing by neutral scientific observers of all persuasions. We have a world out there which we are commanded to teach and to baptize. Those in need of teaching and baptizing are not going to take the word of anonymous for it.
BTW, that calendar is the Gregorian calendar, known for Pope St. Gregory the Great who introduced it. As the late Bishop Fulton Sheen once wrote, Christ's birth was so important that it split all history in two.
The RCC also has fragments of parts of the Mass that are clearly that which date to the early 2nd Century (ca. 120 A.D.)
In any event, I suspect I may disagree with your theology but I must say that I respect your thoroughly reasonable approach to archaeology and its significance and your evident integrity.
Thanks!
As far as your disagreeing with my theology, that's certainly no problem. Actually, sometimes I find that even I disagree with my theology... ;-)