You are looking at a pair of numbered tickets to the 2012 Christmas Eve midnight mass at the Vatican, celebrated by His Holiness Pope Benedict XVI.
This is a very rare find, especially in excellent condition.
Note: The recipient's name and address are blurred in these photos but are visible in the originals.
The liturgy book is full of prayers in Latin and English, and simplified music for chants.
The tickets are two-sided and bear serial numbers.
The letter spells out the procedure for attending in Vatican City, and the original envelope has cancelled Vatican postage on it. This authentication is a highly unusual find.
Please see photos for condition. Priority Mail (insured) shipping is complimentary with this item. Thanks for looking.