"In architecture, a perron generally refers to an external stairway to a building. Curl notes three more-specific usages: the platform-landing reached by symmetrical flights of steps ...
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leading to the piano nobile of a building; the steps themselves; or the platform base of edifices like a market cross. Perron also refers to a type of Belgian civic monument, which usually sits on a perron.
A perron may be placed in front of the main entrance of a building or house, either as a single stone staircase or pair of such staircases leading up to the entrance and built in the Romanesque or Palladian styles and decorated with arches, balustrades and corbels." - (en.wikipedia.org 12.04.2021)