The Romainmôtier Abbey Church was built between 990 and 1028 according to a plan that was identical to the Cluny Church, on the site of former churches. The two-storey narthex was added in the 12th century containing mural paintings for the enlightenment of its faithful. The central nave consists of a Gothic barrel vault with richly coloured ribs.

During the Reform, the dozen resident monks had to leave Romainmôtier and the building became a Protestant place of worship: decorations were hidden underneath whitewashed walls, the statues were decapitated and the altars destroyed.

Two excavation and renovation campaigns were conducted in the 20th century. The Abbey's huge contemporary organ is played on many occasions.

Maison du Prieur, which receives guests of renown, is located a few steps from the Abbey. With its medieval mural paintings, its sculpted beams and its monumental fireplaces, it is available for celebrations and banquets for 50-220 persons.