Many of the earliest buildings were simple gabled rectangles, a style that continued to be built into the seventeenth century. Examples include Dunnottar Castle in the 1580s, Greenock (1591) and Durness (1619), These new buildings often had windows on the south wall and none on the north, which became a unique feature of Reformation kirks. There were continuities with pre-Reformation materials, with some churches using rubble, as at Kemback in Fife (1582). Others employed stone and a few added wooden steeples, as at Burntisland (1592). The church of Greyfriars, Edinburgh, built between 1602 and 1620, used a rectangular layout with a largely Gothic form, but that at Dirleton (1612), had a more sophisticated classical style.