The types of dance performed in social gatherings change with social values. Social dance music of the 14th century has been preserved in manuscript, though without proper choreography, for dances such as the "ballo", carol, "stampita, saltarello, trotto" and "roto". The 15th century is the first period from which written records of dances exist. A manuscript from Brussels highlights the Burgundian court dance, which spread all over Europe, referred to as the basse dance in which a large group perform a series of steps in triple time. Italian courts danced "balli", with a wide array of choreographed rhythms, steps and positions for the dancers. These were documented in instruction books written by the dance masters who choreographed them for the courts.