Casing thumb|left|upright|The organ of the Severikirche in Erfurt, Thuringia, Germany has a highly decorative case with ornate carvings and cherubs. The pipes, action, and wind system are almost always contained in a case, the design of which also may incorporate the console. The case blends the organ's sound and aids in projecting it into the room.Randel "Organ", 580. The case is often designed to complement the building's architectural style and it may contain ornamental carvings and other decorations. The visible portion of the case, called the façade, will most often contain pipes, which may be either sounding pipes or dummy pipes solely for decoration. The façade pipes may be plain, burnished, gilded, or paintedKassel, 146. and are usually referred to as (en) montre within the context of the French organ school.Peter Williams, Barbara Owen, New Grove Dictionary of Music and Musicians, ORGAN STOP: Montre (Fr.). The case pipes of the French organ, corresponding to the English Open Diapason, the German Prestant, the Italian Principale, etc. Early alternative names were ‘le principal de devant’, ‘devanture en monstre’ (Reims Cathedral, 1570). The tone of the classical French Montre was somewhat more fluty than the various English Open Diapason types or German Principals.G.A. AUDSLEY Art of Organ-Building, Vol. I, p.544 : MONTRE, Fr. -The name commonly applied by the French organ builders to such foundations and organ-toned metal stops as may be mounted or displayed in the buffet or case of an organ; accordingly, the MONTRES, which are usually of burnished tin, may be of 32 ft., 16 ft., and 8 ft. speaking lengths, as in the Organ in the Royal Church at Saint Denis near Paris. Sometimes the name is applied to the PRESTANT 4 ft., when its pipes are mounted. All the MONTRES are most carefully fashioned and finished, producing, when of tin brightly burnished, a beautiful effect in combination with the dark wood-work of the case.
casing thumb|left|upright|the organ of the severikirche in erfurt thuringia germany has a highly decorative case with ornate carvings and cherubs the pipes action and wind system are almost always contained in a case the design of which also may incorporate the console the case blends the organ's sound and aids in projecting it into the roomrandel "organ" 580 the case is often designed to complement the building's architectural style and it may contain ornamental carvings and other decorations the visible portion of the case called the façade will most often contain pipes which may be either sounding pipes or dummy pipes solely for decoration the façade pipes may be plain burnished gilded or paintedkassel 146 and are usually referred to as (en) montre within the context of the french organ schoolpeter williams barbara owen new grove dictionary of music and musicians organ stop montre (fr) the case pipes of the french organ corresponding to the english open diapason the german prestant the italian principale etc early alternative names were ‘le principal de devant’ ‘devanture en monstre’ (reims cathedral 1570) the tone of the classical french montre was somewhat more fluty than the various english open diapason types or german principalsga audsley art of organ-building vol i p544  montre fr -the name commonly applied by the french organ builders to such foundations and organ-toned metal stops as may be mounted or displayed in the buffet or case of an organ; accordingly the montres which are usually of burnished tin may be of 32 ft 16 ft and 8 ft speaking lengths as in the organ in the royal church at saint denis near paris sometimes the name is applied to the prestant 4 ft when its pipes are mounted all the montres are most carefully fashioned and finished producing when of tin brightly burnished a beautiful effect in combination with the dark wood-work of the case