The seal matrix belonged to a medieval gentleman called Walter. The red jasper gem was carved in the Roman period.A seal matrix was used to make a mark in hot wax to seal letters and documents.

A treasure expert is appealing for local historians to solve a mystery around the owner of a medieval seal matrix. The 13th or 14th Century silver matrix - used to stamp an impression on wax seals ...

So last week, a group of researchers who were studying a set of medieval books published their ... books - they probably didn't know what a seal was. KELLY: These monks lived in Clairvaux.

A rare medieval illuminated manuscript uncovered ... while she was cataloguing the religious order's collection. The scroll is set to become "the jewel in the crown" of the new Treasures gallery ...