-It is a 90-page paperback guidebook featuring cross-sections, historical maps, and detailed visual breakdowns of the underground structures. -Also included is an official vintage entry ticket (Biglietto personale) issued by the Rev.da Fabbrica di S. Pietro in Vaticano and stamped with a date of July 7, 1987 —See photos for condition and content. Cover has areas of discoloration.
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