During the long history of Latin liturgy there emerged great amount of the musical-liturgical forms, which together with the songs in a new situation of the national languages fell into disuse because a popular form of song substituted them. In the Western Latin liturgy many forms are used, which can be divided according to several criteria. However, they are mostly divided into cantilenas, psalmody, free forms and hymnody. After the Second Vatican Council a common tendency in the whole Church is disappearing of traditional treasure of song created during the whole centuries. If we acknowledge song as the only suitable form for liturgy, richness and beauty will fade away from the prayers, what will finally results in deprivation of a contemporary man in the spiritual, aesthetic and emotional way. The newest tendencies in the individual countries indicate a return to antiphons and thus to so called 'open forms' even in the countries where a strophic song always had a dominant position. Advantage of the open forms is their simple adaptability to liturgical event and time of its duration, relatively easy opportunity for the gathering to join the singing.