The Viking Runes. The eldest runestones, inscribed with Norse runes, date from the century. These were the Elder Futhark runes. However, the most of the runestones were created during the late Viking Age and thus inscribed with theYounger Futhark runes.
The 'squared circle' or 'squaring the circle' is a century alchemical glyph or symbol for the creation of the Philosopher's Stone. The Philosopher's Stone was supposed to be able to transmute base metals into gold and perhaps be an elixir of life.