The 20th century has witnessed a strong worldwide spread of new and alternative musical styles, which in turn constitute an important aspect of the historical evolution of music as an art form. MILL was created to boost and support these practices in Lebanon: free improvisation, free jazz, contemporary classical music, post-rock, experimental electronic music, sound-art as well as many other attempts to explore new and uncharted territories in sound.
Irtijal has achieved considerable growth during its 15 years of existence, going from a one-day festival in 2001 to 4-6 days since 2003; the number of concerts has grown from 4 to 20, while that of international guest artists from 5 to 30. Over the past 15 years Irtijal has unquestionably inscribed itself as the main annual event for new and innovative music in the Lebanese artistic scene, and is rightly considered as the largest structure of its kind in the Arab world.