A group of Armenian and Polish archaeologists has found a rich burial of a couple in Metsamor. Most probably spouses. The date is around 3200 years before present. So it's Lchashen culture period. Crosses similar to Celtic style are remarkable.
Metsamor was an important fortified city in Early Iron Age. With advanced metallurgic and jewelry industry. You can see similar artefacts from previous excavations in the link below. They are exposed in Metsamor museum.
The Polish source.