In England, curtains began to replace wooden shutters towards the end of the 16th century. In Medieval England, the earliest form of window treatments were leather panels threaded onto iron rods. These were eventually replaced with woven wool panels. During the reign of Elizabeth I, ornately decorated Italian Renaissance fabrics, including brocades, velvets, and damask, began to be imported. These ornate fabrics, as well as fabrics decorated with crewel embroidery, were used in curtains during the English Elizabethan and Jacobean periods. Solid wood shutters were used during cold seasons.