This is a white earthenware plate, known as Kubachi ware. This style was done during the Safavid period. Thought to have been done in the 1550s. It features a seated musician wearing a Safavid taj (see the links below) and a dancer playing castinets.
The plate is currently in the Victoria & Albert Museum
If interested, this pdf document by Master Safi al-Khansaa, known mundanely as Heather Stiles can be read here, covering men’s Safavid head wear. Via Google Docs. The one for women’s head wear can be found here. They are notes from the Persian University held at Pennsic War a few years ago.