Born in Madrid in 1965, Juan Carlos Argüello, better known as Muelle, is considered to be the first Spanish graffiti writer. 

Towards 1980, Muelle's signature starts to be seen around the city walls and subway stations of the city of Madrid.  

The city, in the middle of the eighties fever, adopted and made its own the signature as a symbol of the modernity and transgression that its streets were living. Juan Carlos was a pioneer for his art and for the identification of himself as a brand, which in 1985 made him register his brand: Muelle®. 

As time passed by the design of his signature developed, as well as the places where he depicted it, selecting locations with good visibility, that wouldn't spoil the urban landscape or that generate an expense respecting private property, establishing the first bases of graffiti art in Spain. 

Parallel to his activity in the streets, Juan Carlos took comissions from institutions, businesses and individuals, apart from creating an important private collection of art pieces, exhibited throughout the years in different museums, art galleries and foundations. 

Juan Carlos passed away in 1995 due to cancer. 

Three decades have gone by and Muelle's popular recognition hasn't stopped, amongst the most prominent things are the naming of a plaza in the City of Madrid after his name, the restauration and conservation of the signature in Montera street, and the recent announcement from the Community of Madrid that his pieces will be exhibited in 2022 in the Campamento subway station.