The first sardana “Cerdanya” has lyrics by the father of the Escuela Pia Lluis Fontova. After the Suite de Déodat de Séverac, it is the best known work of this project outside the Cerdanya environment. It is a collection of five sardanas, four of them mentioning different places and one of them the popular children's song Plou i fa sol, perhaps in reference to the meteorology of the region. The third of the sardanas is dedicated to Rigolisa, a place near Puigcerdà that houses the Church of San Jaime de Rigolisa, a former pilgrims' pass from Font-Romeu, the town to which the following sardana is dedicated. With a texture of melody and accompaniment and with a predominance of intervals of octaves, thirds and sixths, Monsó uses an interesting and elaborated harmony while playing with the interchange, the superposition and the duplication of voices. These sardanas respond to the usual structure of the sardana llarga. 

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Antoni Monsó, born in Tremp on October 7, 1897, was priest and organist of the Parish Church of Puigcerdà between 1925 and 1936, after being promoted to the presbyterate of the Cathedral of Urgell in 1920. Between these dates he was vicar in San Julià de Lòria (Andorra) and in Bellver de Cerdanya (La Cerdanya). He did his military service in different places, including Melilla and Ceuta, where he taught solfège and piano at the Patronato Militar.

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In Puigcerdà he was also active as a writer for the Full Parroquial of which he was director, the Revista Ceretania and other publications in Catalonia. He composed popular and religious music and conducted the children's choir of the Fomento Cultural de la Cerdanya and the Parish Choir of the Orfeón Infantil. He was assassinated at Collada de Toses on August 12, 1936, during the Spanish Civil War (Castells Serra 1975, 40-41). He also composed the sardanas L'aplec de Talló and the Placeta de les monges (Músics per la cobla). In the book Amicus Meus: una aproximació a la Capella de Santa Maria de Puigcerdà there are other biographical data and references about Monsó (Roig García and Merino Palomar 2023, 28-31).