"Oh dreary rock, do you remember the Pannonian Sea?" Castramentation - the art of building fortified constructions. Stone cannot burn, but it does remember. The Petrovaradin Fortress, which is more than three centuries old, was being built for almost a hundred years. During those years, it is said that the most valuable currency in the area were eggs. Instead of a dish, they ended up in the mortar... ...Planet Fortress.... see more