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,
Symphony No. 6 (Vaughan Williams) strings. Serge Koussevitzky led the score's American premiere on 7 August 1948, at Tanglewood, with the Boston Symphony Orchestra. Before that year was out, the same musicians had taken the work to Boston, Pittsburgh and Chicago (3 December). The first recording was made on 21 February 1949 by the Philharmonic-Symphony Orchestra of New York under Leopold Stokowski, who had been a fellow organ student of Vaughan Williams at the Royal College of Music in the 1890s (and was to give the U.S. premiere of his Ninth Symphony in 1958). The second was by Sir Adrian Boult days later with the