I recently came across a coral tiara of the Bourbon-Two Sicilies family that dates to the 17th Century (LINK). Aside from this, the oldest tiaras I know of all date to the Napoleonic Era. Since there are many people here knowledgeable about jewel history, I thought I would ask: Are there any other Pre-Napoleonic tiaras in existence? How popular were they before the 19th Century?