 The "CD Atlético Baleares" (then called "Baleares FC") was born in 1920 from workers and workers sectors of the city, and "RCD Mallorca" (then called "Real Sociedad Alfonso XIII FC") was created in 1916 by politically and economically powerful social sectors.Today this character is very diluted and both clubs are much more heterogeneous than in the beginning, but the foundational character is still very present.The rivalry has been maintained since the 1920s, despite they competing in different categories for many years (from the 1960s onwards and especially since the 1980s, when [[RCD Mallorca]] made a significant improvement) and through the successive names of the two clubs