The proposal was not a set of rules setting urban criteria, but rather specific road layouts with representative spaces, parks and public facilities, as well as a proposal for diverse population density, questioning one of the central proposals of the Cerdá Plan.[1]​ On the other hand, the project agreed with Cerdá on the centrality of the Plaza de las Glorias Catalanas.[2]​ Its 29 plans manifested the influence of the Beaux-Arts "Beaux Arts" style. (architecture)") of Paris: main axes with visual completions, symmetry, generation of perspectives and a whole set of techniques typical of monumentalism. The plan covered a metropolitan scale of the city with zoning that delimited areas of residence, commerce or industry.[2]​.

The plan, in its attempt to rationalize Barcelona's growth, provided for actions in undeveloped spaces. On the other hand, a differentiated "type of city" reality began to take shape according to social level. While Sarriá, San Gervasio and Horta had a recreational purpose, San Andrés and Sants brought together factories and working classes, while Gracia maintained a industrial character. The plan configured an overall vision between all these realities and a more or less homogeneous growth of the expansion during modernism and noucentisme.[3]​.

But the project was not carried out immediately for two reasons: the municipal financial difficulty, the contradiction of creating a monumental and luxurious building in working-class neighborhoods. Another difficulty that only time could fix was the distance from the new urban center located, according to the proposal, in the Plaza de las Glorias.[2]​.

On July 9, 1903, Barcelona City Council convened the International Competition on preliminary projects to link the Ensanche area of ​​Barcelona and the towns added to each other and to the rest of the municipal area of ​​Sarriá and Horta. The jury included Josep Puig i Cadafalch and Francesc Cambó among its members. Among the five projects presented, the winner was that of the Frenchman Léon Jaussely, which had polycentric characteristics, more typical of the Haussmann style than the linearity of Cerdá. It was part of the triumph of the engineer's detractors.[2]​.

The project was approved in 1907 after having been adjusted by municipal technicians. However, its implementation did not occur formally, but was developed in different partial plans throughout the century.[1]​ The first and the one that can be considered to have included the best adaptation of Jaussely's project, was the one approved on October 25, 1917, the General Urbanization Plan of Barcelona.[2]​.

The proposal was not a set of rules setting urban criteria, but rather specific road layouts with representative spaces, parks and public facilities, as well as a proposal for diverse population density, questioning one of the central proposals of the Cerdá Plan.[1]​ On the other hand, the project agreed with Cerdá on the centrality of the Plaza de las Glorias Catalanas.[2]​ Its 29 plans manifested the influence of the Beaux-Arts "Beaux Arts" style. (architecture)") of Paris: main axes with visual completions, symmetry, generation of perspectives and a whole set of techniques typical of monumentalism. The plan covered a metropolitan scale of the city with zoning that delimited areas of residence, commerce or industry.[2]​.

The plan, in its attempt to rationalize Barcelona's growth, provided for actions in undeveloped spaces. On the other hand, a differentiated "type of city" reality began to take shape according to social level. While Sarriá, San Gervasio and Horta had a recreational purpose, San Andrés and Sants brought together factories and working classes, while Gracia maintained a industrial character. The plan configured an overall vision between all these realities and a more or less homogeneous growth of the expansion during modernism and noucentisme.[3]​.

But the project was not carried out immediately for two reasons: the municipal financial difficulty, the contradiction of creating a monumental and luxurious building in working-class neighborhoods. Another difficulty that only time could fix was the distance from the new urban center located, according to the proposal, in the Plaza de las Glorias.[2]​.