Waldenses n. pl. : A sect of dissenters from the ecclesiastical system of the Roman Catholic Church, who in the 13th century were driven by persecution to the valleys of Piedmont, where the sect survives. They profess substantially Protestant principles.

Example:
In pre-Reformation Christianity, who were the Waldenses?

Taxonomy
Waldensians, Waldensian, churches, Waldensian Church, Italy, History of the Waldenses, the Reformation, Peter Waldo, History, Protestants, South America, claim, American Waldensian Society, sect, valleys, followers, the American, Vaudois.

Defination from the web:
Waldenses or Vaudois are names for a Christian spiritual movement of the later Middle Ages, descendants of which still exist in various regions. ... After the French Revolution the Waldenses of Piedmont were assured liberty of conscience, and in 1848, the ruler of Savoy, ...