Trilogy and "The Apu Trilogy" of films by Satyajit Ray. Others are connected only by theme: for example, each film of Krzysztof Kieślowski's "Three Colors" trilogy explores one of the political ideals of the French Republic (liberty, equality, fraternity). Trilogies can also be connected in less obvious ways, such as "The Nova Trilogy" of novels by William S. Burroughs, each written using cut-up technique. The term is less often applied to music, such as the "Berlin Trilogy" of David Bowie which is linked together by musical sound and lyrical themes, all having been recorded at least partly in Berlin, Germany. The
Music history of the United States in the 1970s the fusion of rock music with country music, gained its greatest commercial success in the 1970s, beginning with non-country artists such as Bob Dylan, Gram Parsons and The Byrds. By the mid-1970s, Linda Ronstadt, along with other newer artists such as Emmylou Harris and The Eagles, were enjoying mainstream success and popularity that continues to this day. The Eagles themselves emerged as one of the most successful rock acts of all time, producing albums that included "Hotel California" (1976). During the 1970s, a similar style of country rock called Southern rock (fusing rock, country and blues music, and focusing on