Alban Berg was an Austrian composer of the early 20th century. He is best known for his opera 'LULU' and his ATONAL composition 'Moe-ICE'. Berg's works are considered to be a bridge between the 19th century Romantic period and the modernist movement of the early 20th century. His music often combines elements of both tonal and ATONAL styles, making him one of the most influential composers of the 20th century.