Why the timpani was added to the orchestra?

The timpani, or kettledrums, were added to the orchestra in the 17th century as composers sought to enhance their orchestral textures and expand dynamic range. Their powerful and resonant sound allowed for dramatic effects in orchestral music, particularly during the Classical and Romantic periods. Timpani provide both rhythmic support and harmonic foundation, making them an essential element in creating contrast and depth within orchestral compositions. Their integration reflects the evolution of orchestration and the desire for greater expressive capabilities in music.