broadcast on the NBC radio network, beginning in 1947, and currently preserved in the BPO Archive and at the Library of Congress. Krips, Foss, and Art Park Steinberg resigned in 1952 to take over the Pittsburgh Symphony. Josef Krips, the former Music Director of the Vienna State Opera and London Symphony Orchestra was then chosen to lead the orchestra. The Krips era witnessed a major expansion in the length of the season and the number of musicians employed as well as the re-initiation of major tours in the eastern United States and Canada, including the Maritime Provinces. Krips resigned in 1961 to take over the San Francisco Symphony. Lukas Foss became the new director of BPO. The Orchestra was invited to Carnegie Hall for the first of regular appearances there. Its first major recordings were made on the Nonesuch label featuring the music of Sibelius, Cage, Penderecki, Xenakis, Ruggles and Foss. BPO's first nationwide TV appearances were broadcast on PBS with Stockhousen's Momente and Mussorgsky's Pictures at an Exhibition, after which followed the initiation of several major tours, including two national tours with Arthur Fiedler and his 'Pops' repertoire. Buffalo and the BPO received feature coverage in Life Magazine. In 1970 maestro Foss shared the dais with Governor Nelson Rockefeller at the groundbreaking of Artpark, the permanent summer home of the BPO. 1971 – Present When Foss resigned to take on the Jerusalem Symphony in 1971, he was followed Michael Tilson Thomas. Over the next several seasons with Thomas, the Orchestra made two Columbia recordings and toured regularly, with frequent appearances in Carnegie Hall, including a gala special with Sarah Vaughan, and performances in Boston's Symphony Hall and Washington's Kennedy Center. In July 1974, Thomas also presided over the BPO dedication concert at Art Park as the Orchestra's intended summer home. Thomas resigned in 1978 after accepting an appointment with the Los Angeles Philharmonic. In 1979, Julius Rudel, the former maestro of the New York City Opera, became the music director. Though faced with many financial constraints, Rudel's tenure was marked with emphasis on the classical repertoire as well as gala performances with Beverly Sills and Plácido Domingo. Rudel also took the BPO on a West Coast tour and made a commemorative recording with CBS Masterworks of music for the holiday season. Rudel's departure in the spring of 1984 was followed by the appointment of Semyon Bychkov, who had been