Ingenious choreographer Merce Cunningham passed away Sunday night, the Washington Post reports. He was 90. With an esteemed six-decades in dance, Cunningham was known for using avant-garde ballet techniques to revolutionize the art form. After beginning his career with the legendary Martha Graham, Cunningham opened his own company in 1953. He collaborated with the innovators of the age, including Andy Warhol, Jasper Johns, and composer John Cage, eventually creating nearly 200 works. The Merce Cunningham Dance Company did not indicate what may have caused Cunningham’s death.