[2] Initially, the walls were installed on the Place de Fontenoy in Paris, but afterwards were enclosed in a building that was constructed in order to protect them from damage caused by acid rain.

[3] Joan Miró and Josep Llorens Artigas met in 1910 at the school of art of the artist Francesc Galí (1880–1965), in Barcelona.

[4] In 1955 Joan Miró was contacted by the heads of UNESCO to ask if he want to take part of the team of artists that decorated the future headquarters of the institution that is located in Paris.

[8] They also visited the Collegiate church and cloister of St Juliana and the romanesque collection of the Museum of Art of Catalonia, the current MNAC.

Beside the ceramist Josep Llorens Artigas, they failed to find technical feasibility for baking pottery in a way that allows to obtain a background textures similar to the paintings of that time.