Filigree gold necklace with Portuguese tiles. This necklace is a beautiful gold filigree of the Heart of Viana. It is not properly gold, it is a replica made of very good quality metal. This type of piece must be careful not to be in contact with perfumes or excessive humidity, which could alter the piece. The origin of the filigree dates back to the third millennium BC in Mesopotamia. The oldest pieces date from 2500 BC and were discovered in the graves of Ur, in present-day Iraq. Other pieces, discovered in Syria, date from approximately 2100 B.C.