Chandos Anthems: My Song Shall Be Alway / Let God Arise / O Praise the Lord With One Consent

Opera seria is the 18th‑century Italian "serious" opera that crystallized around noble, moralizing stories drawn from Classical mythology and ancient history. It privileges elevated rhetoric, clear affects, and vocal virtuosity, especially through the da capo (ABA') aria, where singers ornament the return to display technical brilliance and expressive nuance. Typically organized in three acts, opera seria alternates recitatives (secco with continuo for dialogue; accompagnato with orchestra for heightened drama) and solo arias. Ensemble numbers and choruses are rare, and the dramatic flow is shaped by the famous "exit aria" convention, where characters leave the stage after an aria. The style reached canonical form via Metastasian libretti and dominated courts and major opera houses across Naples, Rome, Venice, Vienna, and London.

A concerto grosso is a Baroque-era orchestral form built on contrasts between a small group of soloists (the concertino) and the full ensemble (the ripieno or tutti). It typically features strings with basso continuo, terraced dynamics, antiphonal dialogue, and clear tonal harmony. Two principal subtypes emerged: the church-oriented sonata da chiesa (often in a four-movement slow–fast–slow–fast plan) and the dance-inflected sonata da camera (suite-like movements). The genre highlights thematic exchange, sequences, and imitation, with the concertino—often two violins and cello—embroidered against broader tutti refrains. Corelli’s models codified its syntax, and Handel’s sets represent its late-Baroque culmination.

Classical music is the notated art-music tradition of Europe and its global descendants, characterized by durable forms, carefully codified harmony and counterpoint, and a literate score-based practice. The term “classical” can refer broadly to the entire Western art-music lineage from the Medieval era to today, not just the Classical period (c. 1750s–1820s). It privileges long-form structures (such as symphonies, sonatas, concertos, masses, and operas), functional or modal harmony, thematic development, and timbral nuance across ensembles ranging from solo instruments to full orchestras and choirs. Across centuries, the style evolved from chant and modal polyphony to tonal harmony, and later to post-tonal idioms, while maintaining a shared emphasis on written notation, performance practice, and craft.