○○○furnace⪢⪢
It's a two-foot gap beneath the floor supported by pillars into which warm air would rush from a furnace in the corner of the room.
http://qindex.info/i.php?x=11837
○○○1054⪢⪢
In 1054, after tensions between Rome and Constantinople, Christianity is split between the Orthodox and Catholic Churches. This further widens the gap between the Slaves of the Kievan Rus' and the Polish Slaves who had converted to Catholicism.
http://qindex.info/i.php?x=11896
○○○ furnace ⪢⪢
○○○ 1054 ⪢⪢
