Before revision: Prominent heortologists were the Sulpician Pierre Batiffol who published History of the Roman Breviary in 1893, Hartmann Grisar who published Analecta Romana in 1899, and the canon Louis Duchesne who publishd studies on the Origins of Christian worship.
After revision: Prominent heortologists were the Sulpician Pierre Batiffol who published History of the Roman Breviary in 1893, Hartmann Grisar who published Analecta Romana in 1899, and the canon Louis Duchesne who published studies on the Origins of Christian worship.