There has been a human occupation in the commune of Saint-Merd-la-Breuille since antiquity. At Manoux, a mound with a
dolmen seems to indicate a
Neolithic occupation. In the
Middle Ages, the Château de Hautefeuille was located on the current territory of the municipality. It is possible to find traces of its existence in 16th century documents. Indeed, this land was sold by Jean de Rochefort to Antoine de la Fayette in 1539. It then remained in the hands of the de La Fayette family, according to what is said by
Guillaume-Michel Chabrol, in Volume IV of his book on the General and Local Customs of the Province of Auvergne (1784): ''"The land of Hautefeuille, parish of Flayat, belonged to Louis de la Fayette. Jean Motier de la Fayette, killed in the day of Cognac in 1568, was lord of it, as well as of Nades. Claude de la Fayette, his son, lord of the same lands, married Marie d'Allègre, daughter of Gaspard, lord of Viverols and Beauvoir, on 22 November 1579. She passed to François de la Fayette, who married Magdeleine Pioche de la Vergne, famous in the Republic of Letters, in 1655. This branch of the Maison de la Fayette has been extinguished in the Maison de la Trimouille."'' The castle was destroyed by Protestants during the
Wars of Religion, in retaliation for the battle of Cognac in 1568, where its lord was killed. It was erected on the hill north of the villages of Gourseix and Vaudeix (at the point quoted at 766 metres above sea level on the IGN map) but on site, there is no record of its existence. However, in the surrounding villages, stones from its ruins have been reused for the construction of houses. A stone with a coat of arms was found on the wall of a house. This coat of arms has been taken over as the municipality's coat of arms. == Politics and administration ==