The Ten Commandments are part of the OT Law, but NT authors do quote or allude to the commandments quite often as being relevant for new covenant Christians (except for one).

The oldest known stone tablet inscribed with the Ten Commandments has been sold at an auction for more than $5 million.

It includes a new directive to worship on Mount Gerizim, a holy site specific to the Samaritans, Sotheby's said. The oldest known stone tablet inscribed with the Ten Commandments sold for more ...

The oldest known tablet inscribed with the Ten Commandments from the Old Testament sold on Wednesday ... according to a statement from Sotheby’s New York, which hosted the sale.