In English times... the feudal hierarchy was as follows:
king-> aristocracy (bishop , baron, duke, then lord) ->
knight -> squire -> peasant or serf
Feudal system: a rigid hierarchy of rights and duties according
to social situation
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japan
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Nobility (king, knights)
Church
Peasants
Serf/slave
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The apothecary would typically fall within the merchant or tradesman class in the feudal hierarchy. They would be considered below the nobility and clergy but above the peasants and serfs in terms of social status and wealth.