Although now in a ruined state, with its huge capstone having fallen off, Zennor Quoit is still an impressive monument. Quoits (also called Dolmens or Cromlechs) are probably the earliest of any of the prehistoric monuments remaining, dating from the early Neolithic period (3500-2500 BC), and were constructed by the early farmers who had recently settled and begun to plant crops and raise cattle. Each group of farmers occupied their own area or territory, and on high ground nearby would construct one of these Quoits. They may originally, or subsequently, have been covered by an earth mound, but the capstone itself may have remained uncovered. Zennor is slightly different from Chûn and Mulfra Quoits [also available as downloadable leaflets] in that it originally had two large facade stones, forming an antechamber to the monument, which may have been used for rituals. The chamber behind is 2.4m (8ft) high, and the whole structure once stood within a barrow 12.8m (42ft) in diameter. The capstone is 5.5m (18ft) long, 2.9m (9.5ft) wide and weighs 9.3 tons. Stones standing to the E of the monument are the remains of a more modern (19th century) cow shed.