Carnivals reached their maximum splendor in Madrid in the 18th century, although they were already a tradition in Madrid in the 16th century.
Masquerade balls were one of the traditions of the aristocracy
During the 18th century, buckles on shoes were very popular and were part of them as a decorative element, surely influenced by French fashion.
The shoes were straight last, that is, both were the same and there was no distinction between left and right foot.