The Beatles were an English rock band formed in Liverpool in 1960. With a line-up comprising John Lennon, Paul McCartney, George Harrison and Ringo Starr, they are often regarded as the most influential band of all time. The group were integral to the evolution of popular music as an art form and to the development of the counterculture of the 1960s. Rooted in skiffle, beat and 1950s rock and roll, their sound incorporated elements of classical music and traditional pop in innovative ways, and they later explored music styles ranging from ballads and Indian music to psychedelia and hard rock. They also pioneered recording techniques, advanced new methods of artistic presentation, and were commonly viewed as emblems of the era's sociocultural movements.