Tanglewood summer since, except for the interval 1942–45 when the Trustees canceled the concerts and summer school due to World War II. The Shed was renovated in 1959 with acoustic designs by BBN Technologies. In 1986 the BSO acquired the adjacent Highwood estate, increasing the property area by about 40%. Seiji Ozawa Hall (1994) was built on this newly expanded property. Leonard Bernstein conducted the Boston Symphony at Tanglewood in August 1990 in what proved to be his very last concert. Deutsche Grammophon released a live recording of the concert on CD. In addition to hosting world-renowned programs of classical, jazz,
Michael Tilson Thomas sheet music, posters, playbills, photographs, as well as costumes and props" From 1968 to 1994, Tilson Thomas was the Music Director of the Ojai Music Festival seven different times. After winning the Koussevitzky Prize at Tanglewood in 1969, Tilson Thomas was named Assistant Conductor of the Boston Symphony Orchestra. That same year, he made his conducting debut with the Boston Symphony Orchestra, replacing an unwell William Steinberg mid-concert and thereby coming into international recognition at the age of 24. He stayed with the Boston Symphony as an assistant conductor until 1974 and made several recordings with the orchestra for Deutsche