You can trace the origins of the term "Galacticos" back to the 1950s, when Real Madrid signed Alfredo Di Stefano, Ferenc Puskas, Raymond Kopa, Jose Santamaria and Francisco Gento in succession.
However, its resurfacing in the 2000s, along with Florentino Perez's expensive taste, is how it is more commonly appreciated in the modern day.
Since then, Perez, in two spells as Madrid president, has tried to ensure a Galactico comes in the door at the Bernabeu every summer.
But how do you rank a Galactico?
The following slides rank 10 of the most significant Galactico signings based on different criteria.
A player's worth as a Galactico increases if Madrid are forced to pay a ton of money to ensure they can sign him, so the first factor considered is cost.
Next up is star appeal—what sort of standing did a given player have in the game when Madrid signed him?
The third factor taken into consideration is advertising, something which, since the signing of David Beckham in 2003, has become increasingly more important in Galactico signings.
And the final two factors were actually based on the pitch: performances for Los Blancos and titles won at the club.
Each player was given a rank out of five for each category and then ranked from one to 10 based on their total score out of 25.