Roselin Osser Classical Concerts in Boston

Mozart Coronation Mass K317; additional Joseph/Michael Haydn music, exact works unannounced. Actual current soloist quartet/conductor/chorus, no inferred biography cast. Numerical general-public admission unconfirmed. Subscription, concession, donation and free-parking benefits are not single-ticket prices. Fees and availability unconfirmed. One individually reviewed public physical classical performance in the 2026–2027 edition. Exact current primary identity/full date/main clock/physical venue required; no guessed end, unnamed cast, biography repertoire, private activity or virtual duplicate. New seasons, changed native IDs and moved performances require continuity review; a missing listing is not cancellation. Current explicit 2026–2027 root endorsement, primary full year/main clock/named physical venue, not designer footer or staff biography. Public Newton/West Newton/Lexington/Cambridge combinations individually reviewed, Sanders identity reused; West Newton is Newton neighborhood. March7 EST, April onward EDT. Salon billed players actual, competition/private education unactivated; no director standardized across programmes, price/end inferred or ticket-form/media request.