Close up of the collar - while this is for a Russian costume, it's Byzantine-inspired. Pinning for the layers of detail creating texture in the collar. Since I can't just use trim for this, I might do something like this to build up the collar.
Beautiful kokoshnik with pearls! - The kokoshnik is a commonly used name for a variety of traditional Russian headdresses worn by women and girls to accompany the sarafan, primarily worn in the northern regions of Russia in the to centuries.