So my question is: would a princess, next in line to the throne, wear a crown, a tiara, a diadem... what? I'm writing a fantasy story, so I suppose I could just make it up... But I still want it to be semi-realistic.
Not sure which time period I would then use as a reference... I'm thinking 17th/18th century.
EDIT: Wow, thanks guys! You gave me more than perfect information - you gave me ideas. You're all wonderful. :)