Johann Dzierzon was a Polish - German beekeeper who made a hive which opened
at the back into which bars were suspended on which the bees built their
comb.  I would imagine this to be a rear opening top bar hive.  I don't
believe he understood the concept of bee space and the hive was difficult to
operate.  The hive was later improved by Baron von Berlepsch who constructed
frames for the comb.

Harry