WHEN IN ROME Odyssey Opera mounts a mini-festival devoted to opera seria, with rarely spotted works by Gluck (“Ezio’’) and Mozart (“Lucio Silla’’) in fully staged performances under the baton of Gil Rose. Through June 12, Boston University Theatre. 617-826-1626, www.odysseyopera.org

INUKSUIT Dozens of New England percussionists join forces to perform the Boston premiere of “Inuksuit,’’ an iconic outdoor work by John Luther Adams, which will have musicians ranging over the conifer collection of the Arnold Arboretum. June 12, 3?p.m., Free. www.kadencearts.org

BOSTON PHILHARMONIC YOUTH ORCHESTRA Under Benjamin Zander’s direction, the BPYO performs two free programs at Carnegie Hall on consecutive nights, with works by Glinka, Stravinsky, Debussy, and Tchaikovsky (June 6) followed by a concert anchored by Mahler and Stravinsky (June 7). 617-236-0999, www.boston phil.org JEREMY EICHLER

Jeremy Eichler can be reached at jeichler@globe.com