who is it? >> it may be a case of mistaken identity. there was another martyr called st. peter who died in around 304. so, it may well be a relic of st. peter, just not st. peter the apostle. >> that would certainly fit with the date. >> however, this doesn't get us any closer to resolving the great mystery whether st. peter was in rome. or what the status of the vatican. >> exactly. >> for that we need to go and sample the material. >> but with no access to the bones found beneath the vatican, it's impossible to say definitively if peter really came to rome. for many, it remains a historical mystery. >> it's not impossible that peter did make the journey to rome, but there is not enough