Yoko Ono, born in 1933 in Tokyo, is a living legend and an influential artist of our time. To mark the artist's 80th birthday earlier this year Louisiana Museum of Modern Art is showing a major retrospective exhibition of well over a hundred works, demonstrating the diversity of media and disciplines in Yoko OnoÕs artistic production and pinpointing the central themes with which Yoko Ono works. For more than 50 years Yoko Ono has been a leading avant-garde artist and a pioneer in the artistic fields to which she has devoted her life, and she continues to occupy a central position in contemporary art. Yoko Ono expresses herself with equal simplicity and originality in visual art, poetry, film, music, installation, performance art and events. The main element in her works is ideas, not materials. Many of these ideas are poetic, bizarre and utopian, others are realizable in practice. They reflect her subtle humour as much as her decidedly socially critical attitudes. While some ideas are manifested in the form of objects, others remain on the non-material plane. The starting point for many of the works is Yoko OnoÕs Instructions, oral or written requests to the public. In this way the artist gives the viewer an active role in the process of creation.