Court ladies never held arms of court gentlemen. It was decided vulgar and wasn’t, actually, comfortable because dresses of that time were really wide. Ladies could only use their fingertips to touch a men’s bent arm. The king and the queen had armchairs where they could sit always near them. Other people were not allowed to sit in an armchair at their presence. Other monarchs were the only exception. Closest people to the king, such as his relatives or children, could sit on a chair with a back but no arms. Nobles of the duke/duchess rank were offered a padded stool, and everyone else had to stand.
Dresses were an important part of the court etiquette. Everyone had to dress appropriately, especially for the Grand Couvert. Women put on fancy dresses and men attached swords to their outfits. If someone had to sword, he could even rent one in Versailles. Finally, in order to enter or leave a room, nobility had to wait for an usher to open the door. As only ushers were allowed to do that, sometimes there were comical situations when people had to wait patiently near the closed doors.
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