When leaving the Cassagnac Mill, visitors are invited to take part in a kind of 'treasure hunt', guided by interactive programmes along the streets of Plaisance. Again, it is intended to create something attractive for kids, but adapted for all ages, so as to be interesting to adults.
The scenario will be developed in partnership with the directors of the Games Festival network, which is held at Plaisance du Gers every year in August. The treasure hunt will bring back to life a historical figure of Plaisance du Gers - Louis-Alexandre Olleris – who has given his name to the primary school, the library and one of the streets. A well-known 19th century historian, he was one of the first to translate the works of the monk Gerbert, who was elected Pope in 1000 AD, and wrote the first treatise in mathematics that made it possible to calculate the dimensions of . . . organ pipes !
Starting at a 19th century building from Olleris' time, the treasure hunt will lead us back to the Plaisance of the Middle Ages, gradually revealing through the town setting the builders' symbols and secrets which complete the introductory review presented in the Mill.
The urban tour is intended to lead many visitors of the 'Cité de l'Orgue' to wander through Plaisance du Gers, thus finding local shops and cafes. The tour will also bring people in contact with the church organ and altar-piece. This instrument, erected at ground-level in the church sanctuary, is endowed with large shutters painted by Daniel Ogier. An automatic mechanism, triggered by insertion of a coin, will light up the shutters in 'closed' position. A few minutes later, the organ will start to play automatically, with music accompanying the opening of the shutters and the uncovering of the instrument's façade and the painted images of this true 'organ-altarpiece'. It should be noted that construction of the organ at Plaisance du Gers has renewed a link with a tradition lost at the end of the 18th century. This modern creation is itself UNIQUE IN EUROPE.
While the organ plays, the keys are depressed, the stop levers come out and return according to the changes in the sound texture. The public is present at a 'normal' organ. But the knowledge acquired during the visit to 'Cité de l'Orgue' allows them to understand that the vast pieces of woodwork conceal complex technology.
When it opens up, the church organ will reveal certain clues in the treasure hunt, and will encourage further exploration of the streets of Plaisance du Gers.
Within the valley of the Adour, the area round Plaisance is endowed with nine organs of complementary artistic quality, dating from the 17th to the 21st century; and this will provide the base for musical tourism, from Tarbes to Aire-sur-l'Adour.
This exceptional situation makes it possible to highlight a little-known heritage, which represents an undeveloped tourist theme.