The life of prayer and communal living was one of rigorous schedules and self-sacrifice. Prayer was their work, and the Office prayers took up much of a monk's waking hours – Matins, Lauds, Prime, Terce, daily Mass, Sext, None, Vespers, and Compline. In between prayers, monks were allowed to sit in the cloister and work on their projects of writing, copying, or decorating books.