Seismographic balancing pillar known as Gavazan, Tatev monastery, 9th-century, Armenia. It's purpose is to alert of minor earth tremors and thus giving early warning signals about possible earthquakes Stickers #166752176
Seismographic balancing pillar known as Gavazan, Tatev monastery, 9th-century, Armenia. It's purpose is to alert of minor earth tremors and thus giving early warning signals about possible earthquakes Poster #166752176
