Breamore Down northwest of the village has several Bronze Age bowl barrows.
There is also a long barrow known as the Giant’s Grave, originally 65m long and 26m wide with flanked ditches, it is now partly damaged. Breamore Down also has a mysterious mizmaze on its heights.

Argument rages as to whether the Bronze Age people or mediaeval monks were responsible for these patterns cut in the turf.[4]
The name Breamore, recorded as Brumore in 1086, may be derived from Old English “Brommor” meaning “broom(covered) marsh”.[6] At an early date the manor of Breamore belonged to the Crown, and in 1086 was part of the royal manor of Rockbourne.[7]

At an early date, probably by grant of Henry I, Breamore passed to the Earls of Devon, lords of the Isle of Wight, who held it from the king in chief. In 1299, Edward I assigned it to his consort, Margaret of France, but in 1302 Breamore was delivered to Hugh de Courtenay.

From that time it descended with the Earls of Devon until it was granted, in 1467, to Walter Blount, 1st Baron Mountjoy.
In 1475, Breamore escheated to the king, who granted it for life in 1490 to Sir Hugh Conway and Elizabeth his wife. In 1512, it was granted to Catherine of York widow of William Courtenay, 1st Earl of Devon and her heirs.

Her son Henry was created Marquess of Exeter in 1525, but was beheaded in 1538–9, when the manor again passed to the Crown.[8]