The National Symphony Orchestra and Choir of ERT perform the music of the Beatles with “Beatles Symphonic,” an open-air concert presented as part of the Stavros Niarchos Foundation Cultural Center’s Parklife series. Conducted by Michalis Oikonomou, the performance reimagines classics, including “Let It Be,” “Yesterday,” “Hey Jude,” “Come Together” and “Here Comes the Sun” through lush orchestral and choral arrangements. Staged on the Great Lawn of Stavros Niarchos Park (364 Syngrou), the free concert blends the relaxed atmosphere of a summer gathering with the power of symphonic performance.