The term 'large stringed instruments' refers to two instruments: harps and cellos. Harps are a type of stringed instrument that have been around since ancient times, and are typically triangular in shape with strings stretched across the soundboard. Cellos are a type of bowed string instrument that originated in the 16th century, and are usually played while seated with the instrument held between the knees. Both instruments are commonly used in orchestras and other musical ensembles.