When where instruments added to the orchestra?

Instruments have been added to the orchestra over centuries, with significant expansions occurring during the Baroque period (1600-1750) when strings and woodwinds became standard. The Classical period (1750-1820) saw the introduction of brass instruments and percussion, enhancing the orchestra's range and depth. The Romantic period (19th century) further expanded the orchestra with more diverse instruments and larger ensembles, establishing the modern symphony orchestra we recognize today. Each era contributed to the evolving sound and complexity of orchestral music.