Distinguished by the monumental eclecticism he left as imprint in many of his projects,[1] he helped define the architectural identity of Madrid in the first half of the 20th century.

[3] Palacios moved to Madrid to start his studies as Engineer; he switched to Architecture, and obtained a degree in 1903.

[4] A prolific architect, he modernized the image of Madrid with some of the most emblematic buildings of the Spanish capital.

[2] He received influence from Secessionist modernismo, but according to Óscar da Rocha Aranda, only as feature within a wider mashup of many eclectic styles, such as Neoplateresque, Neoclassicism and modern US commercial arquitecture.

[1] Palacios, who also designed the interior of some of the original Metro de Madrid stations, was the creator of the iconic rhomboidal logo of the rapid transit.