of the Valkyries. The Boston Globe reported that "Gertrude Robinson Smith strode purposefully to the stage when the concert stopped and addressed the record crowd of 5,000, haranguing: “Now do you see why we must have a permanent building for these concerts?’’ In minutes, more than $30,000 was raised." Music Shed opens, 1938 The following year, the Eliel Saarinen-designed, fan-shaped Shed (now known as the Koussevitzky Music Shed, or simply "the Shed") was constructed, with some 5,100 seats, giving the BSO a permanent open-air structure in which to perform. Broad lawns extend beyond the Shed, providing outdoor space for concert goers and sweeping views of Stockbridge Bowl and Monument Mountain in the distance. At the opening ceremony for the Shed on August 4, 1938, Gertrude Robinson Smith's dedication comments were recorded and can be heard today. The Boston Symphony Orchestra has performed in the Koussevitzky Music Shed every summer since, except for the interval 1942–45 when the Trustees canceled the concerts and summer school due to World War II, and during summer 2020, when performances were cancelled due to the COVID-19 pandemic. 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 final concert. Deutsche Grammophon released a live recording of the concert on CD. Aaron Copland Following his death in 1990, composer Aaron Copland's ashes were scattered over the Tanglewood Music Center. There is a memorial garden with a bust of Copland on the Tanglewood grounds. Young musicians In addition to hosting world-renowned programs of classical, jazz, and popular music, Tanglewood provides musical training. In 1940 conductor Serge Koussevitzky initiated a summer school for approximately 300 young musicians, now known as the Tanglewood Music Center. Also nearby is the Boston University Tanglewood Institute (BUTI), a program that collaborates with young musicians. Days in the Arts (DARTs) is for middle school students and is another organization that collaborates with Tanglewood. Other youth-symphony organizations have performed at either the Music Shed or Ozawa Hall, including the Norwalk Youth Symphony, from Norwalk, Connecticut, the Empire State Youth Orchestra, from Albany, New York, and the Greater Boston Youth Symphony (currently known as the Boston Youth Symphony Orchestras).