(n.) The quality of being courtly; elegance or dignity of manners.

amenities augustness chivalrousness chivalry civilities civility comity convention courtly politeness decencies decorum dignifiedness dignity diplomatic code elegance elegancies etiquette exquisite manners formalities gallantness gallantry good form good manners grandeur gravity kingliness knightliness loftiness lordliness majesty manners mores natural politeness nobility noblesse oblige point of etiquette politeness politesse pride of bearing pride of place princeliness proprieties protocol proud bearing punctilio quiet good manners regality rules of conduct sedateness sobriety social code social conduct social graces social procedures social usage solemnity stateliness venerability worthiness