[pierrem15]

An easy gesture to make since I don't think any authenticated artefacts from the Second Temple exist.

I would assume they were melted down for coins soon after being paraded in Rome. The Jewish Revolt was terribly expensive for Rome and the soldiery would have been owed a share of the loot as pay.

[Campion]

I don't think any authenticated artefacts from the Second Temple exist.

There are two: link. But no others, AFAIK.

I would assume they were melted down for coins soon after being paraded in Rome.

With about a 99% level of certainty. Of course, there's still that 1% ...